@article{VerginFreierGzik2004,
  author    = {Anika Vergin and B. Freier and Axel Gzik},
  title     = {Investigations on effects of plant strengthening products to tri-trophic system field bean (Vicia faba (L.)) - black bean aphid (Aphis fabae Scop.) - lacewing larva (Chrysoperla carnea Steph.)},
  year      = {2004},
}