Blackburn EH, Gall JG (1978). “A tandemly repeated sequence at the termini of the extrachromosomal ribosomal RNA genes in Tetrahymena”. J Mol Biol.120 (1): 33-53. PMID642006.
Greider CW Blackburn EH (1985). “Identification of a specific telomere terminal transferase activity in Tetrahymena extracts”. Cell43 (2 Pt 1): 405–13. PMID3907856.
Greider CW Blackburn EH (1987). “The telomere terminal transferase of Tetrahymena is a ribonucleoprotein enzyme with two kinds of primer specificity”. Cell51 (6): 887-98. PMID3319189.