Damar Adhiwidya Suyanto, Aditya Tri Oktaviana, Yohannes Sardjono, Gede Sutresna Wijaya, and Isman Mulyadi Triatmoko. “The Simulation of Radiation Shielding Made of Portland Material in a 230 MeV 300 NA Cyclotron Room for Proton Therapy Facility Using PHITS Code System”. Jurnal Engine: Energi, Manufaktur, dan Material 9, no. 2 (November 21, 2025): 237–248. Accessed December 5, 2025. https://ejournal.up45.ac.id/index.php/Jurnal_ENGINE/article/view/2339.