Jacopo Rossi, Ursula Gamba, Massimo Pinna, Sandra Spagnolo, Cristina Visentin, Alberto Alma (2006). «Hoverflies in organic apple orchards in north-western Italy». Bulletin of Insectology (Bologna: Facolta' Di Agraria Universita' Di Bologna) 59 (2): 111-114. ISSN1721-8861. Consultado el 8 de enero de 2009.
Santos Rojo, Keith R. Hopper and M. Ángeles Marcos-García (2004). «Fitness of the hover flies Episyrphus balteatus and Eupeodes corollae faced with limited larval prey». Journal Entomologia Experimentalis et Applicata (Springer Netherlands) 81 (1): 53-59. ISSN0013-8703. doi:10.1007/BF00187838.
Santos Rojo, Keith R. Hopper and M. Ángeles Marcos-García (2004). «Fitness of the hover flies Episyrphus balteatus and Eupeodes corollae faced with limited larval prey». Journal Entomologia Experimentalis et Applicata (Springer Netherlands) 81 (1): 53-59. ISSN0013-8703. doi:10.1007/BF00187838.
Jacopo Rossi, Ursula Gamba, Massimo Pinna, Sandra Spagnolo, Cristina Visentin, Alberto Alma (2006). «Hoverflies in organic apple orchards in north-western Italy». Bulletin of Insectology (Bologna: Facolta' Di Agraria Universita' Di Bologna) 59 (2): 111-114. ISSN1721-8861. Consultado el 8 de enero de 2009.