Improving Basic Underhand Passing Technique through Paired Training among Volleyball Players of the Spenra Lumajang Club. COMPETITOR: Jurnal Pendidikan Kepelatihan Olahraga, [S. l.], v. 18, n. 1, p. 0539–0552, 2026. DOI: 10.26858/cpjok.v18i1.539. Disponível em: https://competitor.idjournal.eu/index.php/competitor/article/view/539. Acesso em: 25 may. 2026.