• Author: Pittendrigh, C.S.
• Title: Circadian systems. I. The driving oscillation and its assay in Drosophila pseudoobscura
• Year: 1967
• Reference Type: Journal Article
• Journal/Book Title: Proc Natl Acad Sci U S A
• Volume: 58
• Issue: 4
• Pages: 1762-7
• Date of Publication: Wednesday, 20 December 1967