Fjellberg A., 1973: Anurida frigida. A new species of Collembola (Hypogastruridae) from Swedish Lappland. 3 pp.
 
APT 25
Fjellberg A., 1973: New records of Vertagopus sarekensis (Wahlgren, 1906) from Northern Scandinavia (Collembola, Isotomidae). 8 pp.
 
APT 431
Fjellberg A., 1973: Observations of Onychiurus nervosus Stach, 1954 (Collembola, Onychiuridae) in Eastern Norway. 3 pp.
 
APT 432
Fjellberg A., 1973: Some morphological differences between Proisotoma minuta (Tullberg, 1871) and P. clavipila (Axelson, 1903) (Collembola, Isotomidae). 2 pp.
 
APT 433
Fjellberg A., 1974: Anurophorus atlanticus n. sp. A new species of Collembola (Isotomidae) from Western Norway. 4 pp.
 
APT 26
Fjellberg A., 1974: Karlstejnia norvegica. A new species of Collembola (Onychiuridae, Tullblerginae) from the alpine regions in southern Norway. 4 pp.
 
APT 434
Fjellberg A., 1974: Spinosellima forms of Sminthurides schoetti (Axelson) and S. parvulus (Krausbauer) (Collembola) in Norway. 2 pp.
 
APT 27
Fjellberg A., 1975: Redescription of some little known Collembola from Scandinavia (Insecta: Collembola). 8 pp.
 
APT 28
Fjellberg A., 1975: Vertagopus pseudocinereus n. sp. A new species of Collembola (Isotomidae) from north Norway. 3 pp.
 
APT 29
Fjellberg A., 1976: Proisotoma armeriae n. sp. A new species of Collembola (Isotomidae) from West Norway. 7 pp.
 
APT 32
Fjellberg A., 1982: Redescriptions of Vertagopus brevicaudus (Carpenter, 1900) and V. reuteri (Schott, 1893), two arctic species of Collembola (Isotomidae). 7 pp.
 
APT 34
Fjellberg A., 1985: Xenyllodes wapiti sp. n., a new species of Collembola (Odontellidae) from western Canada. 3 pp.
 
APT 35
Fjellberg A., 1987: A new species of Hypogastrura (Mucrella) from Indiana, USA (Collembola: Hypogastruridae). 3 pp.
 
APT 36
Fjellberg A., 1990: Rediscovery of Knowltonella idahoensis Wray, an autapomorphous Schoettella Schäffer (Collembola: Hypogastruridae). 3 pp.
 
APT 435
Fjellberg A., Poinsot N., 1975: Archistoma polaris n. sp. A new species of Collembola (Isotomidae) from Spitsbergen. 4 pp.
 
APT 38
Friedrich M., Makings P., 1990: Supplementary taxonomic characters for the discrimination of Petrobius brevistylis Carpenter from P. maritimus (Leach) in both sexes (Microcoryphia, Machilidae). 9 pp.