@ARTICLE{
author={Kavallieratos Nickolas G,Stathas GJ,Tomanovic Zeljko M},
year={2004},
title={Seasonal abundance of parasitoids (Hymenoptera : Braconidae, Aphidiinae) and predators (Coleoptera : Coccinellidae) of aphids infesting citrus in Greece},
journal={BIOLOGIA},
volume={59},
number={2},
pages={191-196},
document_type={Article},
} 

@ARTICLE{
author={Kavallieratos Nickolas G,Athanassiou Christos G,Stathas GJ,Tomanovic Zeljko M},
year={2002},
title={Aphid parasitoids (Hymenoptera : Braconidae : Aphidiinae) on citrus: Seasonal abundance, association with the species of host plant, and sampling indices},
journal={PHYTOPARASITICA},
volume={30},
number={4},
pages={365-377},
document_type={Article},
}