1. Retroviruses produced by hybridomas;Weiss;N Engl J Med,1982
2. Biological and molecular characterisation of an endogenous retrovirus present in CHO/HBs-A Chinese hamster cell line;Hojman;Dev Biol Stand,1989
3. Recent studies on retrovirus-like particles in Chinese hamster ovary cells;Dinowitz;Dev Biol Stand,1992
4. Detection of viruses in recombinant cells by electron microscopy;Liptrot,1992
5. Viral contaminants found in mouse cell lines used in the production of biological products;Froud,1997