1. [1] Hirian, C., Georgescu, M., 2009 The stability of old salt mines in Romania. The condition of their use in various fields (in Romanian). Universitas Publishing, Petroșani
2. [2] Horváth, I., 2002 The geologic description of the Praid salt deposit (in Romanian).
3. [3] Onica,I., Cozma,E., 2014 Stability analysis of the Praid Saline strength structures in the conditions of the roadheaders rocks salt cutting, Mining Revue, Vol. 20, No. 3, pp. 15-22.
4. [4] ***, 2010 Continously cutting edge, Mining Magazine, January/February, pp.12-16.
5. [5] ***, 2009 Operation Focus – Poland, Euro Copper, în International Mining, November, pp.10-16.