[1]D. C. Csiminga, PMI, т. 167, вып. 2, сс. 309-312, фев. 2006.

[1]D. C. Csiminga, "The Strategy of National Pit Coal Company – Consequence of Restructuring Romanian Mining Industry in the Context of Romanian Adhesion to the European Union", PMI, vol. 167, no. 2, pp. 309-312, Feb. 2006.