Reference

Heiko T. Jansen, Tanya Leise, Gordon Stenhouse, Karine Pigeon, Wayne Kasworm, Justin Teisberg, Thomas Radandt, Robert Dallmann, Steven Brown, Charles T. Robbins (2016): The bear circadian clock doesn’t ‘sleep’ during winter dormancy – Frontiers in Zoology – 2016: 42-0001-42-0016.