## References * Godfrey Harold Hardy, A Mathematician's Apology, 1st published, 1940. Reprinted, C.P. Snow (foreword) * Rota, Gian-Carlo (1977). "The phenomenology of mathematical beauty" * Jonathan M. Borwein, aesthetics for the working mathematician, [pdf](http://oldweb.cecm.sfu.ca/personal/jborwein/apaper.ps)