Chen Y, Geng A, Zhang W, Qian Z, Wan X, Jiang Y, Mao Z (December 2020). "Fight to the bitter end: DNA repair and aging". Ageing Research Reviews. 64: 101154. doi:10.1016/j.arr.2020.101154. PMID32977059. S2CID221824975.
Common, Laura. (April 25, 2000) The Medical Post[1]Great balls of fire: from prehistory, men have tried implants and extracts from macho animals to cure impotence, but it was only relatively recently that they began to understand why they did so.
Chen Y, Geng A, Zhang W, Qian Z, Wan X, Jiang Y, Mao Z (December 2020). "Fight to the bitter end: DNA repair and aging". Ageing Research Reviews. 64: 101154. doi:10.1016/j.arr.2020.101154. PMID32977059. S2CID221824975.
Chen Y, Geng A, Zhang W, Qian Z, Wan X, Jiang Y, Mao Z (December 2020). "Fight to the bitter end: DNA repair and aging". Ageing Research Reviews. 64: 101154. doi:10.1016/j.arr.2020.101154. PMID32977059. S2CID221824975.