[1]
S. Singh, P. Sinha, U. Gupta, G. N. K., and A. Srivastava, “Status of vitamin D, paratharmone and serum calcium levels in perimenopausal women and their mutual correlation”, Int J Reprod Contracept Obstet Gynecol, vol. 5, no. 11, pp. 4009–4013, Dec. 2016.