Aquatic specializations in anuran nasal morphology: the pipoid frogs. American Zoologist. 26:A84.. 1986.
Lifemapper, VisTrails and EML: Documented, Re-executable Species Distribution Models. Environmental Information Management. :65-69.. 2011.
Ontogeny of the bizarre: an osteological description of Pipe pipa (Anura: Pipidae), with an account of skeletal development in the species. Journal of Morphology. 243:75–104.. 2000.