[16] 还有两种鲸鱼也有更年期:Naked Scientists, podcast, 7 Feb. 2017.
[17] 提出了两种主要理论:Bainbridge, Middle Age, pp. 208-211.
[18] 顺便说一句,说更年期由:同上,p. 199.
[19] 纽约阿尔伯特·爱因斯坦医学院的一项研究:Scientific American, Sept. 2016, p. 58.
[20] 也是万里挑一的事:‘The Patient Talks Back', New York Review of Books, 23 Oct. 2008.
[21] 老年学研究小组:‘Keeping Track of the Oldest People in the World', Smithsonian, 8 July 2014.