1. The milk molars of Perissodactyla with remarks on molar occlusion;Butler,1952
2. Molarization of the premolars in the Perissodactyla;Butler,1952
3. The ontogeny of molar pattern;Butler;Biol. Rev.,1956
4. Relationships between upper and lower molar patterns;Butler,1961
5. Contribution à l'étude de la diffentiation des dents jugales chez mammifères: essai d'une théorie de la dentition;Friant;Publs. Mus. natn. Hist. nat.,1933