Chaudhry, M., S. Grover, S. Baisakhiya, A. Bajaj, and M. S. Bhatia. “Artificial Drainage Devices for Glaucoma Surgery: An Overview”. Nepalese Journal of Ophthalmology, vol. 4, no. 2, July 2012, pp. 295-02, doi:10.3126/nepjoph.v4i2.6547.