1. Comparative study of the effect of epinephrine and norepinephrine on cardio-vascular system of turtle alligator, chicken and opossum;Akers,1963
2. The three toed sloth, Bradypus cuculliger cuçulliger;Beebe;Zoologica,1926
3. Form and function in the sloth;Britton;Quart. Rev. Biol.,1941
4. Form and function in the sloth;Britton;Quart. Rev. Biol.,1941
5. Adrenaline, noradrénaline, réflexes sinocarotidien chez le parresseux (Bradypus tridactylus);Chaves;Arch. Int. Physiol. Biochem.,1960