A second varanopseid skull from the Upper Permian of South Africa: implications for Late Permian ‘pelycosaur’ evolution
S. P. Modesto,
C. A. Sidor,
B. S. Rubidge, and
J. Welman
2001
Article
Lethaia
34(4):249-259
Find it at:
http://dx.doi.org/10.1080/002411601753292971