Ricarte, Antonio, Zorica Nedeljković, Javier Quinto, and María Ángeles Marcos-García. 2010. “The Genus Ferdinandea Rondani, 1844 (Diptera, Syrphidae) in the Iberian Peninsula: First Records and New Breeding Sites”. Journal of the Entomological Research Society 12 (3):57-69. https://www.entomol.org/journal/index.php/JERS/article/view/256.