K. Riswan, M. Fani Cahyandito, A. Herwany, and M. Anwar, “The Investors’ Perspective on Investment Attractiveness of Oil and Gas Exploration Industry in Indonesia”, IJET, vol. 7, no. 4.15, pp. 409–412, Oct. 2018, doi: 10.14419/ijet.v7i4.15.23592.