Citation: Oe. Heie et Em. Pike, REASSESSMENT OF THE TAXONOMIC POSITION OF THE FOSSIL APHID FAMILY CANADAPHIDIDAE BASED ON 2 ADDITIONAL SPECIMENS OF CANADAPHIS-CARPENTERI (HEMIPTERA, APHIDINEA), European journal of entomology, 93(4), 1996, pp. 617-622
Citation: A. Albrecht et al., PEMPHIGUS-FUSCICORNIS (KOCH) AND APHIS-SPIRAEPHAGA FOUND IN FINLAND (HOMOPTERA, APHIDOIDEA), Entomologica Fennica, 7(2), 1996, pp. 94-94
Citation: Oe. Heie, WHY ARE THERE SO FEW APHID SPECIES IN THE TEMPERATE AREAS OF THE SOUTHERN-HEMISPHERE, European journal of entomology, 91(1), 1994, pp. 127-133