R. Khairiyatul Afiyah, Y. Septianingrum, Y. Puspitasari, and A. Rahmawati, “The Psychological Response to Menarche in Elementary School Students is Influenced by Age, Perception, Knowledge, and Information Sources”, J. Nurs. Pract, vol. 9, no. 2, pp. 438–445, Jan. 2026.