• Author: Ralph, M. R. R. G. Foster F. C. Davis M. Menaker
• Title: Transplanted suprachiasmatic nucleus determines circadian period
• Year: 1990
• Reference Type: Journal Article
• Journal/Book Title: Science
• Volume: 247
• Issue: 4945
• Pages: 975-8
• Date of Publication: Thursday, 20 December 1990