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Frogs with claws: Diversity, morphology, and function of pedal unguals in the Astylosternidae. Journal of Morphology. 268,(2007).
Somite number and vertebrate evolution. Development. 125, 151-160.(1998).
Jaw muscle development as evidence from embryonic repatterning in direct-developing frogs. Proceedings of the Royal Society of London - Series B: Biological Sciences. 264, 1349-1354.(1997).
Mechanistic basis of life-history evolution in anuran amphibians: Direct development. American Zoologist. 37, 160-171.(1997).
There is no highly conserved embryonic stage in the vertebrates: Implications for current theories of evolution and development. Anatomy & Embryology. 196, 91-106.(1997).
Life history and morphological evolution. Journal of Evolutionary Biology. 5, 549-557.(1992).