Reference
Christian Bernasconi, Daniel Cherix, Bernhard Seifert, Pekka Pamilo (2011): Molecular taxonomy of the Formica rufa group (red wood ants) (Hymenoptera: Formicidae): a new cryptic species in the Swiss Alps? – Myrmecological News = Myrmecologische Nachrichten – 014: 37 - 47.