KARTIKA, W.; FAUZIAH, F. N.; SYAIFUDIN, A. Ovulation Time Calculation Software Based on Pascal Language. Journal of Electrical Technology UMY, [S. l.], v. 1, n. 3, p. 143–147, 2017. DOI: 10.18196/jet.1319. Disponível em: https://journal.umy.ac.id/index.php/jet/article/view/4789. Acesso em: 16 sep. 2025.