1. Waddington CH. The Epigenotype. Endeavor. 1942;1:18-20. International Journal of Epidemiology. 2012;41:10-13
2. Waddington CH. The Strategy of the Genes. London: George Allen & Unwin; 1957
3. Enríquez P. CRISPR-mediated epigenome editing. Yale Journal of Biology and Medicine. 2016;89:471-486
4. Goldberg AD, Allis CD, Bernstein E. Epigenetics: A landscape takes shape. Cell. 2007;128:635-638
5. Berger SL, Kouzarides T, Shiekhattar R, Shilatifard A. An operational definition of epigenetics. Genes & Development. 2009;23:781-783