G. C. Saha, M. Akhtaruzzaman, E. Mustafa, A. Mahmud, and S. K. Sikder, “Changes in Glomerular Filtration Rate and Its Relation to Serum Calcium Level in Advanced Stages of Chronic Kidney Disease”, J. Natl Inst. Neurosci Bangladesh, vol. 1, no. 1, pp. 15–17, Apr. 2015.