Shimada T, Hoshi E, Watanabe T, Endo A
Experientia. 1980 Aug 15;36(8):971-2. doi: 10.1007/BF01953826.
Diurnal variations of serum zinc level and liver zinc level of the golden hamster were found throughout the 4-day estrous cycle, and on the different days of the cycle, the patterns of fluctuation differed.