Arjan Mann i Ryan S. Paterson. Cranial osteology and systematics of the enigmatic early ‘sail-backed’ synapsid Echinerpeton intermedium Reisz, 1972, and a review of the earliest ‘pelycosaurs’. „Journal of Systematic Palaeontology”, w druku. DOI: 10.1080/14772019.2019.1648323. (ang.).
Roger B. J. Benson. Interrelationships of basal synapsids: cranial and postcranial morphological partitions suggest different topologies. „Journal of Systematic Palaeontology”. 10 (4), s. 601–624, 2012. DOI: 10.1080/14772019.2011.631042. (ang.).
Neil Brocklehurst, Robert R. Reisz, Vincent Fernandez i Jörg Fröbisch. A Re-Description of ‘Mycterosaurus’ smithae, an Early Permian Eothyridid, and Its Impact on the Phylogeny of Pelycosaurian-Grade Synapsids. „PLoS ONE”. 11 (6): e0156810, 2016. DOI: 10.1371/journal.pone.0156810. (ang.).
