Zahira Itsna Uswatun Hasanah, Karina Nur Ramadhanintyas, and Retno Widiarini, “The Relationship between Occupational Safety and Health (K3) Knowledge and Machine Work Productivity at UPT Crew Madiun Train”, AJPM, vol. 4, no. 8, pp. 4154–4163, Aug. 2026.