Sharma, M. K., S. P. Khanal, and R. Adhikari. “School Water, Sanitation, and Hygiene: A Systematic Review of an Effect on Health, Attendance, Regularity, and Educational Achievements”. Scholars’ Journal, vol. 5, no. 1, Dec. 2022, pp. 1-21, doi:10.3126/scholars.v5i1.55744.