• Author: Menaker, M.
• Title: Extraretinal light perception in the sparrow. I. Entrainment of the biological clock
• Year: 1968
• Reference Type: Journal Article
• Journal/Book Title: Proc Natl Acad Sci U S A
• Volume: 59
• Issue: 2
• Pages: 414-21
• Date of Publication: Friday, 20 December 1968