The origin of Lissamphibia dated by three techniques suggests a Permian, monophyletic origin

by Marjanovič, David, Laurin, Michal
Source: 1. 6th Meeting of the European association of vertebrate palaeontologists 1. Spišská Nová Ves : Múzeum Spiša, 2008 1. 9788085173031 1. S. 63-64