Aubrey J. Kempner (Oct 1916). «On Transcendental Numbers». Transactions of the American Mathematical Society (Transactions of the American Mathematical Society, Vol. 17, No. 4) 17 (4): 476–482. doi:10.2307/1988833.
Champernowne, David (1933). «The onstruction of decimals normal in the scale of ten». Journal of the London Mathematical Society8 (4): 254–260. doi:10.1112/jlms/s1-8.4.254.
Knuth, Donald (1976). «Mathematics and Computer Science: Coping with Finiteness. Advances in Our Ability to Compute are Bringing Us Substantially Closer to Ultimate Limitations». Science194 (4271): 1235–1242. doi:10.1126/science.194.4271.1235. PMID17797067.
Knuth, Donald (1976). «Mathematics and Computer Science: Coping with Finiteness. Advances in Our Ability to Compute are Bringing Us Substantially Closer to Ultimate Limitations». Science194 (4271): 1235–1242. doi:10.1126/science.194.4271.1235. PMID17797067.