1. Estudios citogeneticos sobre el genero Pleuro-dema y sus consecuencias evolutivas (Amphibia, Anura, Leptodactylidae);Barrio;Physis,1970
2. Relaciones cariosistematicas de los Cerato-phryidae de la Argentina (Amphibia, Anura);Barrio;Physis,1970
3. Further studies on polyploid amphibians. A diploid population of Phyllomdedusa burmeisteri;Batistic;J. Hered.,1975
4. Cytological evidence of constant tetraploidy in the bisexual South American frog Odontophrynus americanus;Beçak;Chromosoma (Berlin),1966
5. Polyploidy and mechanisms of karyotypic diversification in Amphibia;Beçak;Cytogenetics,1970