1. Edwards, C.A., Reichle, D.E., Crossley, D.A., Jr.: The role of soil invertebrates in turnover of organic matter and nutrients. In: Reichle, D. E. (Ed.): Analysis of temperate forest ecosystems, pp. 147–172. Berlin-Heidelberg-New York: Springer 1970.
2. Fjellberg, A.: Populasjonsutvikling hos Collembola. IBP i Norge: Årsrapport 1971, 134–141 (1972).
3. Fjellberg, A.: Collembol-faunaen på forsommeren 1970. IBP i Norge: Årsrapport 1972, 194–201 (1973).
4. Fjellberg, A.: Organization and dynamics of Collembola populations on Hardangervidda. In: Wielgolaski, F.E. (Ed.): Fennoscandian tundra ecosystems, Part 2: Animals and systems analysis, pp. 73–79. Berlin-Heidelberg-New York: Springer 1975.
5. Gyllenberg, G.: A note on the use of irreversible thermodynamics in population ecology. Entomologiske Meddelelser 42, 78–79 (1974)