GORBY PASANGKA, Irvandi. Teorema Titik Tetap Pemetaan Kontraksi-ψ-ω Bernilai Banyak pada Ruang Metrik Lengkap-α. Jurnal Sains Dasar, [S. l.], v. 9, n. 2, p. 50–53, 2021. DOI: 10.21831/jsd.v9i2.38603. Disponível em: https://journal.uny.ac.id/index.php/jsd/article/view/38603. Acesso em: 10 may. 2025.