Reference

Martin Gascoigne-Pees, Rudi Verovnik, Colin Wiskin, Christopher Luckens, Milan Duric (2012): Notes on the lifecycle of Melitaea arduinna (Esper, 1783) ("Freyer’s Fritillary") (Lepidoptera: Nymphalidae) with further records from SE Serbia – Nachrichten des Entomologischen Vereins Apollo – 33: 9 - 14.