Damayanti, S., Yosmar, S. and Afandi, N. 2023. IMPLEMENTATION OF FUZZY TIME SERIES CHEN FOR FORECASTING INDONESIAN OIL AND GAS IMPORTS VALUE. BAREKENG: Jurnal Ilmu Matematika dan Terapan. 17, 2 (Jun. 2023), 0685-0694. DOI:https://doi.org/10.30598/barekengvol17iss2pp0685-0694.