PURBA, James. The Generalized Riemann Integral. Jurnal Matematika, Statistika dan Komputasi, [S. l.], v. 21, n. 2, p. 520–537, 2025. DOI: 10.20956/j.v21i2.41557. Disponível em: https://journal.unhas.ac.id/index.php/jmsk/article/view/41557. Acesso em: 22 feb. 2025.