1. Andrews P. 1981. Species diversity and diet in monkeys and apes during the Miocene p. 25-61. In C. B. Stringer (ed.) Aspects of human evolution. Taylor and Francis Ltd. London.
2. Andrews P. 1985. Family groups systematics and evolution among catarrhine primates p. 14-22. In E. Delson (ed.) Ancestors: the hard evidence. Alan R. Liss Inc. New York.
3. Cloned endogenous retroviral sequences from human DNA;Bonner T. I.;Proc. Natl. Acad. Sci. USA,1982
4. Callahan R. 1988. Two families of human endogenous retroviral genomes p. 91-100. In Banbury report 30: eukaryotic transposable elements as mutagenic agents. Cold Spring Harbor Laboratory Cold Spring Harbor N.Y.
5. A new class of endogenous human retroviral genomes;Callahan R.;Science,1985