BRITTON, S. W. Form and Function in the Sloth. The Quarterly Review of Biology. 1941-03-01, roč. 16, čís. 1, s. 13–34. Dostupné online [cit. 2021-01-04]. ISSN0033-5770. doi:10.1086/394620.
BRITTON, S. W. Form and Function in the Sloth. The Quarterly Review of Biology. 1941-03-01, roč. 16, čís. 1, s. 13–34. Dostupné online [cit. 2021-01-04]. ISSN0033-5770. doi:10.1086/394620.
BRITTON, S. W. Form and Function in the Sloth. The Quarterly Review of Biology. 1941-03-01, roč. 16, čís. 1, s. 13–34. Dostupné online [cit. 2021-01-04]. ISSN0033-5770. doi:10.1086/394620.