Liu, B; Wang, Y; Melana, SM; Pelisson, I; Najfeld, V; Holland, JF; Pogo, BG (15 February 2001). "Identification of a proviral structure in human breast cancer". Cancer Research. 61 (4): 1754–9. PMID11245493.
Petropoulos, C. (March 11, 1997). "Retroviral Taxonomy, Protein Structures, Sequences, and Genetic Maps". Retroviruses. Cold Spring Harbor Laboratory Press – via www.ncbi.nlm.nih.gov.