UTAMI, Pipit; FAJAR, Muklas. Pengembangan Trainer Indikator Denyut Jantung. Elinvo (Electronics, Informatics, and Vocational Education), [S. l.], v. 1, n. 1, p. 65–77, 2015. DOI: 10.21831/elinvo.v1i1.13308. Disponível em: https://journal.uny.ac.id/index.php/elinvo/article/view/13308. Acesso em: 11 jul. 2025.