Neuroethology : do hibernating lemurs sleep? - Klopfer, Peter; Krystal, Andrew D.; Williams, Cathy V. (Quo vadis, behavioural biology? : past, present, and future of an evolving science ; international symposium of the Humboldt-Universität zu Berlin and the German National Academy of Sciences Leopoldina, Berlin, April 30 to May 4, 2009 ; with 2 tables.(2013))