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Betts, Dean H., Vilceu Bordignon, Jonathan R. Hill, Quinton Winger, Mark E. Westhusin, Lawrence C. Smith, and W. Allan King. "Reprogramming of Telomerase Activity and Rebuilding of Telomere Length in Cloned Cattle." Proc Natl Acad Sci U S A 2001.

Betts, Dean H., et al. "Reprogramming of Telomerase Activity and Rebuilding of Telomere Length in Cloned Cattle." Proc Natl Acad Sci U S A 2001.