Early Oligocene insect fauna from Seifhennersdorf (Saxony, Germany) Jakub Prokop , Martin Fikáček 2007 | volume 63 | issue 2-4 | pages 205–213 PDF
New fossil Aculeata from the Oligocene of the České Středohoří Mts. and the Lower Miocene of the Most Basin in northern Czech Republic (Hymenoptera: Apidae, Vespidae) Jakub Prokop , André Nel 2003 | volume 59 | issue 3-4 | pages 163–171 PDF
