SUKMAYADI, Yudi; SUPIARZA, Hery; ANDINI, Mustika. The Learning Stages of Ngroncongi/Undul usuk: Achieving the Original Solo Keroncong Singing Style. Malaysian Journal of Music, [S. l.], v. 11, n. 1, p. 84–108, 2022. DOI: 10.37134/mjm.vol11.1.6.2022. Disponível em: https://ejournal.upsi.edu.my/index.php/MJM/article/view/6270. Acesso em: 13 may. 2025.