Astibia, H.; et al. (September 1990). "The fossil vertebrates from Lano (Basque Country, Spain); new evidence on the composition and affinities of the Late Cretaceous continental faunas of Europe". Terra Nova. 2 (5): 460–466. Bibcode:1990TeNov...2..460A. doi:10.1111/j.1365-3121.1990.tb00103.x.
Astibia, H.; et al. (September 1990). "The fossil vertebrates from Lano (Basque Country, Spain); new evidence on the composition and affinities of the Late Cretaceous continental faunas of Europe". Terra Nova. 2 (5): 460–466. Bibcode:1990TeNov...2..460A. doi:10.1111/j.1365-3121.1990.tb00103.x.
Laduke, T.C., Krause, D.W., Scanlon, J.D. and Kley, N.J. (2010). "A Late Cretaceous (Maastrichtian) snake assemblage from the Maevarano Formation, Mahjanga Basin, Madagascar". Journal of Vertebrate Paleontology. 30 (1): 109–138. Bibcode:2010JVPal..30..109L. doi:10.1080/02724630903409188.{{cite journal}}: CS1 maint: multiple names: authors list (link)