«Evelyn Butler Tilden» (en anglès). NIH Intramural Research Program, 24-03-2023.
worldcat.org
Tilden, Evelyn Butler. The response of the monkey (Macacus rhesus) to withdrawal of vitamin A from the diet (Ph.D. thesis). (tesi) (en anglès). Ithaca, N.Y.: Columbia University, 1929. OCLC16115448. «CiteSeerX 10.1.1.585.4570»