D. Bretán, P. Szűcs, R. Miklós, and C. Ilyés, “Geothermal energy utilization in the Bükkalja region by reusing abandoned hydrocarbon wells”, IJEMS, vol. 4, no. 4, pp. 351–357, Dec. 2019, doi: 10.21791/IJEMS.2019.4.40.