P. OP’T Veld, E. J. A. ERWIN Roijen, K. Bojadgieva, A. Benderev, V. Ristov, T. Kehaiov (2008). POTENTIAL USE OF GEOTHERMAL ENERGY FROM ABANDONED COAL MINES (REMINING-LOWEX PROJECT). 8th International Scientific Conference - SGEM2008, 319-326.