English Four classes of extant tetrapods URL: https://commons.wikimedia.org/wiki/user:Petter_B%C3%B8ckman Wikimedia username: Petter Bøckman author name
"Triadobatrachus massinoti, the earliest known lissamphibian (Vertebrata: Tetrapoda) re-examined by µCT scan, and the evolution of trunk length in batrachians"
