Pandey M, Pradhan A. Age of attainment of menarche and factors affecting it amongst school girls of Gangtok, Sikkim, India. Int J Contemp Pediatr [Internet]. 2017 Oct. 24 [cited 2026 Jan. 7];4(6):2187-92. Available from: https://www.ijpediatrics.com/index.php/ijcp/article/view/1160