Author E. J. Sobczyk
 

Evaluation of management of hard coal reserves using cluster analysis methods

Gospodarka Surowcami Mineralnymi – Mineral Resources Management 2000;16(3):5–26
 

Practical aspects of efficient exploitation of hard coal deposits

Gospodarka Surowcami Mineralnymi – Mineral Resources Management 2002;18(Zeszyt specjalny 1):59–67
 
eISSN:2299-2324
ISSN:0860-0953