A. Khanal, P. Parajuli, S. Niraula, R. Singh, and P. Suwal, “Distance Between the Most Prominent Labial Surface of Maxillary Central Incisors to the Posterior Limit of Incisive Papilla in Various Arch Forms”, J. Nep. Prosthodon. Soc., vol. 2, no. 2, pp. 73–77, Dec. 2019.