T. QuocHoan, H. V. Bun, and N. A. Nghia, “RESEARCH ON BUILDING FOR DEPENDENCE OF INSULATION PARAMETERS OF THE 6kV GRID WITH THE ENVIROMENT AND STRUCTURAL PARAMETERS OF OPEN-PIT MINES IN THE QUANG NINH AREA”, Int. J. Eng. Tech. Mgmt. Res., vol. 7, no. 5, pp. 56–63, Jun. 2020.