Robert, Szep, Csaba, Borboly, Arad, Victor, ARAD, Susana. "REHABILITATION METHOD OF THE AREAS NATURALLY CONTAMINATED WITH HEAVY METALS FROM THE BALAN METALLIFEROUS DISTRICT (ROMANIA, HARGHITA, ORIENTAL CARPATHIANS) IMOBILIZATION BY APATITE." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2012 12th International Multidisciplinary Scientific GeoConference (2012): 675 - 684 pp. https://doi.org/10.5593/sgem2012/s20.v5091