(1)
Humagain, M.; Thapa, S.; Lamichhane, S.; Rijal, A. H.; Neupane, M.; Koirala, P. Association Between Subjective Happiness and Periodontal Disease in Patients Visiting at a Tertiary Care Centre of Central Nepal. J Nepal Soc Perio Oral Implantol 2023, 7, 3-7.