Nikolova, I. and Georgieva, N. (2014) “Effects of biological insecticides NeemAzal T/S and Pyrethrum FS EC and their interaction with organic products in treatments of pea aphid Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae) on Pisum sativum (L.)”, Pesticides and Phytomedicine / Pesticidi i fitomedicina, 29(3). doi: 10.2298/pif.v29i3.6385.