1. Coffin, J. M., Hughes, S. H. & Varmus, H. E. (eds) Retroviruses (Cold Spring Harbor Press, 1997).
2. Kurth, R. & Bannert, N. (eds) Retroviruses: Molecular Biology, Genomics and Pathogenesis (eds Kurth, R. & Bannert, N.) (Caister Academic, 2010).
3. Goff, S. P. in Fields Virology Ch. 55 (eds Knipe, D. M. et al.) 1999–2069 (Lippincott Williams & Wilkins, 2007).
4. Hirsch, A. J. The use of RNAi-based screens to identify host proteins involved in viral replication. Future Microbiol. 5, 303–311 (2010).
5. Boeke, J. D. & Stoye, J. P. Retrotransposons, endogenous retroviruses, and the evolution of retroelements. Retroviruses [online] , (1997). A good introduction to the basic properties of ERVs.