Piya, A., B. Shrestha, and J. Acharya. “Perception of Pain Resulting from Orthodontic Separators in Orthodontic Patients Visiting Dental Department at a Private Hospital”. Nepal Medical College Journal, vol. 20, no. 4, Dec. 2018, pp. 150-4, doi:10.3126/nmcj.v20i4.25138.