Siregar NRAA, Farida F, Falasifah S, Fahmi MFE, Chamidah N. Pemodelan Harga Minyak Mentah Dunia Berdasarkan Efek Pandemi Covid-19 Dengan Estimator Penalized Spline. MUST [Internet]. 2022 Dec. 18 [cited 2024 May 18];7(2):152-66. Available from: https://journal.um-surabaya.ac.id/matematika/article/view/16377