M. Daan

University of Groningen Gradual reappearance of post-hibernation circadian rhythmicity correlates with numbers of vasopressin-containing neurons in the suprachiasmatic nuclei of European ground squirrels Hut,

E. A. Jansen, R. Zee, K. Gerkema, 2001 .

Lab Mice in the Field: Unorthodox Daily Activity and Effects of a Dysfunctional Circadian Clock Allele

Serge Daan, Alexei Vyssotski, Giacomo Dell'Omo, 2011, Journal of biological rhythms.