L. H. Al-Dulaimy, S. B. Al-Deen Al-Mukhtar, M. Taib Taher, and L. I. Al-Allaf, “Histochemical study of alkaline phosphatase enzyme in gallbladder containing cholesterol stones”, Ann. coll. Med. Mosul , vol. 39, no. 2, pp. 166–171, Dec. 2013.