Siddiqi, N. J., E. A. Al omireeni, and A. S. Alhomida. 2011. “Effect of Different Doses of Sodium Fluoride on Various Hydroxyproline Fractions in Rat Serum”. Cellular and Molecular Biology 57 (1):93-99. https://www.cellmolbiol.org/index.php/CMB/article/view/961.