Muhammad Azhar Sherkheli, Zeeshan ul Haque, Abdul Latif, Zeeshan Asif, Shoaib ur Rehman, Seema Aftab, “Frequency of Vitamin D Deficiency in Mothers and Neonates at a Tertiary Care Hospital ”, IJPRT, vol. 16, no. 1, pp. 2443–2448, May 2026.