http://mathworld.wolfram.com/TuppersSelf-ReferentialFormula.html* Bailey, D. H.; Borwein, J. M.; Calkin, N. J.; Girgensohn, R.; Luke, D. R.; and Moll, V. H. Experimental Mathematics in Action.
http://mathworld.wolfram.com/TuppersSelf-ReferentialFormula.html* Bailey, D. H.; Borwein, J. M.; Calkin, N. J.; Girgensohn, R.; Luke, D. R.; and Moll, V. H. Experimental Mathematics in Action.