4) Kim NW, Piatyszek MA, Prowse KR, Harley CB, West MD, Ho PL, Coviello GM, Wright WE, Weinrich SL, Shay JW : Specific association of human telomerase activity with immortal cells and cancer. Science (1994) 266, 2011-2015.
5) Shay JW, Bacchetti SA : Survey of telomerase activity in human cancer. Eur J Cancer (1997) 33, 787-791.