• Author: Zavada, A. M. C. Gordijn D. G. Beersma S. Daan T. Roenneberg
• Title: Sleeping habits and morningness-eveningness preferences in a dutch population.
• Year: 2004
• Reference Type: Journal Article
• Journal/Book Title: Sleep-wake research in the Netherlands.
• Volume: 15
• Pages: 115-118
• Date of Publication: Monday, 20 December 2004