(1)
Lykouressis, D. P.; Polatsidis C. Ρ. Seasonal Abundance of Acyrthosiphon Pisum (Harris) (Homoptera: Aphididae) and Therioaphis Trifolii (Monell) (Homoptera: Gallaphididae) on Lucerne in Central Greece. EH 1990, 8, 41-46.