Damayanti, Septri, Siska Yosmar, and Nur Afandi. 2023. “IMPLEMENTATION OF FUZZY TIME SERIES CHEN FOR FORECASTING INDONESIAN OIL AND GAS IMPORTS VALUE”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan 17 (2), 0685-94. https://doi.org/10.30598/barekengvol17iss2pp0685-0694.