Giri, Dhirendra Kumar, et al. “Oral Hygiene and Periodontal Status of Visually Impaired Individuals of a Residential School in Eastern Nepal”. Journal of Nepalese Society of Periodontology and Oral Implantology, vol. 3, no. 2, Dec. 2019, pp. 51-53, doi:10.3126/jnspoi.v3i2.30882.