Abdelkarem, Hala Mohamed Mokhtar, Nawal Abudall Al-Badr, and Hanan Seleim Al-Naser. 2014. “The Effect of Caffeine on Some Indicators of Bone Metabolism in Rats”. European Journal of Chemistry 5 (4):657-61. https://doi.org/10.5155/eurjchem.5.4.657-661.922.