1. http://www.fda.gov/ohrms/dockets/ac/cber05.html#VaccinesandRelatedBiological; [assessed 16.11.05].
2. Points to consider for the characterization of cell lines used to produce;Biologicals,1993
3. Guidance for industry: characterization and qualification of cell substrates and other biological materials used in the production of viral vaccines for infectious disease indications. September, 2006.
4. Retrotransposons, endogenous retroviruses, and the evolution of retroelements;Boeke,1997
5. Integration;Brown,1997