Seasonal changes in circadian rhythms of body temperatures in humans living in a dry tropical climate

A. Buguet, R. Gati, G. Soubiran, J. P. Straboni, A. M. Hanniquet, G. Livecchi-Gonnot & J. Bittel
European Journal
Physiology and Occupational Physiology volume 58, pages334–339(1988)

https://link.springer.com/article/10.1007%2FBF00417272