Campbell, K.H.S., McWhir, J., Ritchie, W.A. nad Wilmut, A. Sheep cloned by nuclear transfer from a cultured cell line, PMID 8598906Nature, 1996 issue 6569, pages 64-66 (англ.)
Wilmut, I., Schnieke, A.E., McWhir, J., Kind, A.J., Campbell, K.H.S. Viable offspring derived from fetal and adult mammalian cells PMID 9039911Nature, 1997 issue 6619 pages 810—813 (англ.)