Olmi M., 1975: Scelta della vittima in insetti imenotteri e connessioni noc il sistema degli ospiti omotteri. (Hymenoptera Dryinidae et Homoptera Auchenorhyncha). 9 pp. 

 Olmi M., 1975: Una specie primitiva, Dryops goidanichi sp. n.: nuovo endemismo afgano (Coleoptera, Dryopoidea). 6 pp. 

 Olmi M., 1976: Dryops kaszabi sp. n. from Hungary (Coleoptera, Dryopidae). 3 pp. 

 Olmi M., 1976: I driinidi e il controllo biologico delle cicaline (Hymenoptera Dryinidae et Homoptera Auchenorhyncha). 24 pp. 

 Olmi M., 1976: Variabilita morfologica di un Cicadellide dannoso alle graminacee foraggere negli alti pascoli peimontesi Diplocolenus (Verdanus) abdominalis (F.) (Hemiptera, Cicadellidae). 10 pp. Fragmenta entomologica 12(1): 103-112.

 Olmi M., 1977: Revision of the C. G. Thomson species of Gonatopodinae (Hymenoptera: Dryinidae). 2 pp. 

 Olmi M., 1980: Coleoptera: fam. Dryopidae. 2 pp. Fauna of Saudi Arabia 2: 122-123.

 Olmi M., 1981: Results of the czechoslovak-iranian entomological Expeditions to Iran. Together with results of collections made in Anatolia 1947 and 1970. Coleoptera, Dryopoidea: Dryopidae and Elminthidae. 3 pp. [AQA 435] Acta entomologica Musei nationalis Pragae 40: 337-339.

 Olmi M., 1987: New species of Dryinidae, with description of a new subfamily from Florida and a new species from Dominican amber (Hymenoptera, Chrysidoidea). 28 pp. (in English). Bolletino del Museo regionale di Scienze Naturali – Torino 5(1): 211-238.

 Olmi M., 1992: Dryinidae of the Aggtelek National Park (Hymenoptera: Chrysidoidea). 2 pp. [HYM 2869] Folia Entomologica Hungarica (S.N.) 53: 127-128.

 Olmi M., 1992: New records of Dryinidae from Nicaragua and a description of a new species (Hymenoptera: Chrysidoidea). 6 pp. 

 Olmi M., 1994: New species of Dryinidae from Madagascar (Hymenoptera Chrysidoidea). 12 pp. 

 Olmi M., 1998: A contribution to the knowledge of the Dryinidae (Hym. Chrysidoidea). 11 pp. Lambillionea 98(1): 49-59.

 Olmi M., 1998: Taxonomic remarks on Australian Dryinidae with description of new species (Insecta, Hymenoptera, Chrysidoidea). 6 pp. Spixiana 21(1): 53-58.

 Olmi M., 2004: New species of Dryinidae from Colombia (Insecta, Hymenoptera, Chrysidoidea). 8 pp. Spixiana 27(2): 147-154.

 Olmi M., 2005: A contribution to the knowledge of Dryinidae of the Neotropical and Australian regions (Insecta, Hymenoptera, Chrysidoidea). 10 pp. Spixiana 28(3): 271-280.

 Olmi M., 2008: New species of Dryinidae from the Afrotropical Region (Insecta, Hymenotpera, Chrysidoidea). 7 pp. Spixiana 31(2): 215-221.

 Olmi M., Copeland R. S. Guglielmino A., 2015: An updated checklist of Dryinidae, Embolemidae and Sclerogibbidae (Hymenoptera) of Kenya and Burundi, with descriptions of thirteen new species. 48 pp. Acta Entomologica Musei Nationalis Pragae 55(1): 333-380.

 Olmi M., Currado I., 1974: Studi sui Gonatopodini (Dryinidae) con partiolare riguardo a quelli conservati nel museo civico di storia naturale di Genova. 44 pp. 

 Olmi M., Currado I., 1975: Su alcuni tipi di Dryinidae di Ljungh, Snellen van Vollenhoven a Klug (Bethyloidea). 20 pp. 

 Olmi M., Currado I., 1977: Gonatopodinae extraeuropei conservati nel Museo Civico di Storia Naturale di Genova (Hymenoptera: Dryinidae). 30 pp. 

 Olmi M., Currado I., 1977: On the identity of Gonatopus pedestris Dalman (Hymenoptera: Dryinidae). 3 pp. 

 Olmi M., Currado I., 1979: Revisione del genere Haplogonatopus R. C. L. Perkins (Hymenoptera Dryinidae). 8 pp. 

 Olmi M., Orphanides G. M., 1994: A new species of the genus Aphelopus from Cyprus (Hymenoptera Dryinidae). 6 pp. 

 Olmi M., Orphanides G. M., 1994: A new species of the genus Aphelopus from Cyprus (Hymenoptera Dryinidae). 6 pp. (in English).  Bolletino del Museo regionale di Scienze Naturali – Torino 12(2): 407-412.

 Olmi M., Xu Z., Guglielmino A., 2014: Descriptions of new fossil taxa of Dryinidae (Hymenoptera: Chrysidoidea) from Burmese amber (Myanmar). 12 pp. Acta entomologica Musei nationalis Pragae 54(2): 703-714.

 Olmo J. M., 1991: Estudi preliminar dels ortopters de Menorca. 9 pp. Ses. Entom. ICHN-SCL, Barcelona. 7: 3-11.

 Oloumi-Sadeghi H., Zavaleta L. R., Roberts S. J., Armbrust E. J., Kapusta G., 1988: Changes in morphological stage of development, canopy structure, and root nonstructural carbohydrate reserves of alfalfa following control of potato leafhopper (Homoptera: Cicadellidae) and weed populations. 8 pp. 

 Olsen S. L., 1994: Exploitation of mammals at the early bronze age site of west ron fen (Mildenhall 165), Suffolk, England. 39 pp. Annals of Carnegie Museum 63(2): 115-153.

 Olson C. A., 1994: Floyd Gerald Werner 1921-1992. 12 pp. (in English). Psyche 101(1-2): 1-12.

 Olson L., Violani C., 1995: Some unusual hybrids of Ramphocelus, with remarks on evolution in the genus (Aves: Thraupinae). 16 pp. (in English). Bolletino del Museo regionale di Scienze Naturali – Torino 13(1): 297-312.

 Olson S. L., Violani C., 1995: Some unusual hybrids of Ramphocelus, with remarks on evolution in the genus (Aves: Thraupinae). 16 pp. 

 Olsufiev N. G., 1969: To the taxonomy and distribution of Tabanidae (Diptera) of the Palaearctic region. 7 pp. Acta entomologica Bohemoslovaca 66: 115-121.

 Olsufiev N. G., Leclercq M., 1971: Some problems of the nomenclature of palaearctic Tabanidae (Diptera). 2 pp. 

 Olsufiev N. G., Moucha J., Chvála M., 1964: Chrysozona scutellata sp. n. aus Mitteleuropa (Diptera, Tabanidae). 3 pp. [DIP 2493] Acta Societatis entomologicae Cechosloveniae 61: 284-286.

 Olsufiev N. G., Moucha J., Chvála M., 1967: Zur taxonomie und Verbreitung der europäischen und kleiasiatischen Arten der Tabanus bovinus – Gruppe (Diptera, Tabanidae). 11 pp. Acta entomologica Bohemoslovaca 64: 303-313.

 Olszak R., 1979: Occurrence of gall midges (Diptera, Cecidomyiidae) in aphid colonies on apple trees. 11 pp. (in Polish). [DIP 2495] Polskie Pismo Entomologiczne 49: 185-195.

 Olszanowski Z., 1991: New mites of Holonothrus from Tasmania (Oribatida: Crotoniidae). 12 pp. [ARA 350] [M25] Genus.

 Olszanowski Z., 1994: A new species of Camisia von Heyden from Poland (Acari: Oribatida: Camisiidae). 6 pp. [ARA351] Genus 5(3): 209-214.

 Olszanowski Z., 1996: A monograph of the Nothridae and Camisiidae of Poland (Acari: Oribatida: Crotonoidea). 201 pp. Genus.

 Olszanowski Z., 1997: New oribatid species of the genus Crotonia from Brazil (Acari): Crotonidae). 7 pp. [ARA1698] Genus 8(3-4): 719-725.

 Olszanowski Z., 1997: Trimalaconothrus rafalskii n. sp. – a new oribatid mite species from Poland (Acari: Oribatida: Malaconothridae). 1 pp. [ARA1699] Genus 8(1): 103-108.

 Olszanowski Z., Bromberek K., 2011: Novonothrus lucasi spec. nov., a new moss mite from Australia (Acari: Oribatida: Nothridae). 9 pp. Genus 22(4): 667-675.

 Olszanowski Z., Rajski A., Niedbala W., 1996: Acari: Oribatida. Katalog fauny Polski XXXIV(9). 243 pp.  Discount 50%!

 Olszanowski Z., Szywilewska A., Norton R. A., 2001: New moss mite of the Camisia from western Nearctic region (Acari: Oribatida: Camisiidae). 12 pp. (in English). [ARA 1890] [M25] [M26] Genus 12(3): 395-406.

 Olszanowski Z., Szywilewska-Szczykutowicz A., Blaszak C., Ehrnsberger R., 2007: Die Milben in der Zoologischen Staatssammlung München. Teil 10. Überfamilie Crotonioidea (I) (Acari, Oribatida). 9 pp. Spixiana 30(2): 159-167.

 Oman P. W., 1938: Revision of the nearctic Leafhoppers of the tribe Errhomenellini (Cicadellidae). 18 pp. 

 Oman P. W., 1947: The types of auchenorrhyncous Homoptera in the Iowa State College collection. 68 pp. 

 Oman P. W., Beamer R. H., 1944: Some new species of Cuerna (Homoptera – Cicadellidae). 10 pp. 

 Oman P., 1987: The leafhopper genus Errhomus (Homoptera: Cicadellidae: Cicadellinae) systematics and biogeography. 72 pp.