Tham khảo Labyrinthodontia

  1. ↑ Hall, edited by Brian K. (2007). Fins into limbs: evolution, development, and transformation . Chicago: University of Chicago Press. tr. 334. ISBN 0226313379.Quản lý CS1: văn bản dư: danh sách tác giả (liên kết)
  2. 1 2 Parsons, Alfred Sherwood Romer, Thomas S. (1986). The vertebrate body . Philadelphia: Saunders College Pub. ISBN 978-0-03-910754-3.
  3. ↑ Clack J. A. (2007): Devonian climate change, breathing, and the origin of the tetrapod stem group. Integrative and Comparative Biology, PDF doi:10.1093/icb/icm055
  4. ↑ Laurin M. (1998): The importance of global parsimony and historical bias in understanding tetrapod evolution. Part I-systematics, middle ear evolution, and jaw suspension. Annales des Sciences Naturelles, Zoologie, Paris, 13e Série 19: pp 1–42.