M. Yokoyama

Effect of photoperiod, injection of pentobarbitone sodium or lesion of the suprachiasmatic nucleus on pre-partum decrease of blood progesterone concentrations or time of birth in the rat.

N. Murakami, T. Etoh, H. Kuroda, 1987, Journal of reproduction and fertility.

[Effects of learning schedules on operant behavior in toluene inhaled rats (author's transl)].

T. Misawa, S. Shigeta, H. Aikawa, 1981, Nihon eiseigaku zasshi. Japanese journal of hygiene.

The origin of progesterone in blood when a bacterial solution is infused into the uterus of rats

Reiichiro Sato, N. Takagi, K. Kaneko, 2012, Reproductive Medicine and Biology.