Reform and amendment of Russian petroleum fiscal term: trends and implication to asset acquisitionJin Zhang, Xiuling Yin, Zuxin Li, Dufen Sun and Shenaoyi LiuOil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 75 (2020) 43DOI: https://doi.org/10.2516/ogst/2020042