Journal Article
Spangenberg, R.; Wipfler, B.; Friedemann, K.; Pohl, H.; Weirauch, C.; Hartung, V.; Beutel, R. G.: The cephalic morphology of the Gondwanan key taxon Hackeriella (Coleorrhyncha, Hemiptera). Arthropod structure & development
42 (4), pp. 315 - 337 (2013)