Chakraborti, C., K. Palchoudhury, and J. Das. “Closure of Sino-Orbital Fistula Using Glabellar Rotation Flap: A Case Report”. Nepalese Journal of Ophthalmology, vol. 11, no. 2, Dec. 2019, pp. 211-4, doi:10.3126/nepjoph.v11i2.27829.