G. Bhaskar, A. Ambastha, N. Mohan, S. Sinha, and S. Shree, “Arrugas Bone Trephine Assisted Flapless Dacryocystorhinostomy with Circumosteal – Mitomycin C Versus External Dacryocystorhinostomy: A Hospital Based Comparative Study”, Nep J Oph, vol. 13, no. 2, pp. 169–176, Jun. 2021.