The evolution of competition and cooperation in world crude oil flows from the perspective of complex networks and its enlightenment to China's oil cooperation
XIA Si-you, HAO Li-sha, TANG Wen-min, CUI Pan-pan, WU Feng-lian
JOURNAL OF NATURAL RESOURCES . 2020, (11): 2655 -2673 .  DOI: 10.31497/zrzyxb.20201108