Reference

Rolf Georg Beutel, Evgeny Yan, Adrian Richter, Sebastian Büsse, Kelly B. Miller, Margarita I. Yavorskaya, Benjamin Wipfler (2017): The head of Heterogyrus milloti (Coleoptera: Gyrinidae) and its phylogenetic implications – Arthropod Systematics and Phylogeny – 75: 261 - 280.