Patterson В. 1977. A primitive pyrothere (Mammalia, Notoungulata) from the early Tertiary of northwestern Venezuela. Fieldiana Geology, 33, 397 — 422. (Эта статья содержит также переописание черепа Pyrotherium из Аргентины.)

Paula Couto С. de. 1952. Fossil mammals from the beginning of the Cenozoic in Brazil: Condylarthra, Litopterna, Xenungulata and Astrapotheria. Bulletin of the American Museum of Natural History, 99, 355 — 394.

Paula Couto C. de. 1963. Um Trigonostylopidae do Paleoceno do Brasil. Anales Academia Brasileira de Ciencias, 35, 339 — 351.

Gaudry A. 1909. Fossiles de Patagonie: le Pyrotherium. Annales de Paleontologie, Paris, 4, 28 p.

Scott W. B. 1910. Litopterna of the Santa Cruz beds. Reports of the Princeton University Expeditions to Patagonia, 7, 1 — 156.

Scott W. B. 1937. The Astrapotheria. Proceedings of the American Philosophical Society, 77, 309 — 393.

Simpson G. G. 1933. Structure and affinities of Trigonostylops. American Museum Novitates, 608, 1 — 28.

См. также литературу к гл. 1 и ссылку на работу Simpson, 1948, 1967 в конце гл. 6.