1. Benton, M.J., No gap in the middle Permian record of terrestrial vertebrates, Geology, 2012, vol. 49, pp. 339–342.
2. Bulanov, V.V. and Golubev, V.K., The aquatic block of the late Permian Sundyr tetrapod community of Eastern Europe, in Permskaya sistema: stratigrafiya, paleontologiya, paleogeografiya, geodinamika i mineral’nye resursy. Sb. mater. Mezhd. nauch. konf., posvyashch. 170-letiyu so dnya otkrytiya permskoi sistemy (5–9 sent. 2011 g.) (Proc. Int. Conf. 170th Anniversary of the Discovery of the Permian System “The Permian: Stratigraphy, Paleontology, Paleogeography, Geodynamics, and Mineral Resources”), Perm, 2011, pp. 47–55.
3. Chase, J.N., Neldasaurus wrightae, a new rhachitomous labyrinthodont from the Texas Lower Permian, Bull. Mus. Compar. Zool. Harvard Univ., 1965, vol. 133, pp. 153–225.
4. Cisneros, J.C., Marsicano, C., Angielczyk, K.D., et al., New Permian fauna from tropical Gondwana, Nat. Commun., 2015, vol. 6:8676. https://doi.org/10.1038/ncomms9676
5. Citton, P., Ronchi, A., Maganuco, S., et al., First tetrapod footprints from the Permian of Sardinia and their palaeontological and stratigraphical significance, Geol. J., 2019, vol. 5, pp. 2084–2098.