Pham, K. Q., T. T. Pham, and V. H. T. Du. “Proposing Incentive Policies and Regulatory Framework for the Development of Marginal Fields in Vietnam”. Petrovietnam Journal, Vol. 11, Nov. 2015, pp. 51 -55, https://tapchidaukhi.vn/index.php/TCDK/article/view/860.