1. Brown-Séquard CE (1889) Des effets produits chez l'homme par des injections sous-cutanées d'un liquide retiré des testicules frais de cobaye et de chien (Effects in man of subcutaneous injections of freshly prepared liquid from guinea pig and dog testes). C R Séances Soc Biol Sér 9(1):415-419. Reprinted and translated in: Emerson GM
2. (ed) (1977) Benchmark papers in human physiology, vol 11, Aging. Dowden, Hutchinson and Ross, Stroucodsburg, pp 68-76
3. Carrel A (1935) Man, the unknown. Harper and Bros., New York
4. Child CM (1915) Senescence and rejuvenescence. The University of Chicago Press, Chicago
5. Flourens MJP (1855) On human longevity and the amount of life upon the globe. Translated from the French by Charles Martel. Bailliere, London (first published in French in 1854)