C. J. Anya, I. Nnodim, A. A. Anya, L. O. Edenene, O. O. Eboh, and E. Osobase, “Knowledge, attitude and perception of menstruation and menstrual hygiene among secondary school students in a semi-urban area in South-South Nigeria”, Int J Reprod Contracept Obstet Gynecol, vol. 15, no. 11, pp. 4342–4348, Oct. 2026.