Doan Tien Quyet, Cao Thi Hoai Phuong and Nguyen Thu Ha 2020. The crude oil market in 2019 and outlook for 2020. Petrovietnam Journal. 1, (Jan. 2020), 49 - 57. DOI:https://doi.org/10.25073/petrovietnam journal.v1i0.38.