Bhaskar, G., 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”. Nepalese Journal of Ophthalmology, vol. 13, no. 2, June 2021, pp. 169-76, doi:10.3126/nepjoph.v13i2.30264.