Mohammadullah, M. N. Islam, M. M. Zaki, T. Rahman, M. I. Rashid, and M. I. Ali, “Evaluation of Chronic Gingivitis in Response to Nickel Chromium and Gold Alloy Crown”, J. paediatr. surg. Bangladesh, vol. 14, no. 1, pp. 39–44, Apr. 2026.