Warisyu, D., D. Mangopo, and Handoko. “COORDINATION ANALYSIS OF OCR AND GFR PROTECTION SYSTEM ON EXPRESS KOYA SUBSTATION 70 20 KV HOLTEKAMP JAYAPURA”. Telecommunication, Electrical and Electronics Journal, vol. 2, no. 3, Mar. 2025, pp. 30-33, doi:10.65306/j.teletronic.v2i3.83.