I Made Arya Pratama, I Made Arya Pratama, et al. “Reliability and Safety-Driven Availability in Railway Signaling: Quantitative Modeling of Failure Modes, Degraded Operations, and Delay Risk”. Techne: Journal of Engineering, Technology and Industrial Applications, vol. 1, no. 2, June 2025, pp. 88-100, https://ejournal.kalampractica.com/index.php/techne/article/view/18.