1. Chiarelli, B.: Chromosomes of the Orang-Utan (Pongo pygmaeus). Nature 192: 825, 1961.
2. Hamerton, J.L., Klinger, H.P., Mutton, D.E. and Lang, E.M.: The somatic chromosomes of the Hominoidea. Cytogenetics 2: 240, 1963.
3. Klinger, H.P., Hamerton, J.L., Mutton, D. and Lang, E.M.: The chromosomes of the Hominoidea. In Classification and Human Evolution ( Washburn, S.L., ed.), Aldine Publishing Co., Chicago, 1963.
4. Egozcue, J.: Primates. In Comparative Mammalian Cytogenetics ( Benirschke, K., ed.), Springer-Verlag, New York, 1969.
5. Chiarelli, B.: Comparative morphometric analysis of the primate chromosomes. I. The chromosomes of the anthropoid apes and of man. Caryologia 15: 99, 1962.