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Arjan Mann; Jason D. Pardo; Hillary C. Maddin (2019). "Infernovenator steenae, a new serpentine recumbirostran from the 'Mazon Creek' Lagertätte further clarifies lysorophian origins". Zoological Journal of the Linnean Society. 187 (2): 506–517. doi:10.1093/zoolinnean/zlz026.
Paton, R. L.; Smithson, T. R.; Clack, J. A. (8 April 1999). "An amniote-like skeleton from the Early Carboniferous of Scotland". Nature (dalam bahasa Inggris). 398 (6727): 508–513. Bibcode:1999Natur.398..508P. doi:10.1038/19071. ISSN0028-0836.
Paton, R. L.; Smithson, T. R.; Clack, J. A. (8 April 1999). "An amniote-like skeleton from the Early Carboniferous of Scotland". Nature (dalam bahasa Inggris). 398 (6727): 508–513. Bibcode:1999Natur.398..508P. doi:10.1038/19071. ISSN0028-0836.