Schardt, U Splitting of the circadian activity rhythm in common marmosets (Callithrix j. jacchus; primates). [electronic resource] - Experientia Dec 1989 - 1112-5 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0014-4754 Standard No.: 10.1007/BF01950173 doi Subjects--Topical Terms: Activity Cycles--physiologyAnimalsCallithrix--physiologyCallitrichinae--physiologyCircadian Rhythm--physiologyFemaleLightMalePeriodicity