Dr. eng. Jerzy KICKI – scientific worker of AGH-University of Science and Technology, Department of Underground Mining, Head of Department of Mineral Resources Acquisition in Polish Academy of Sciences, Institute of Mineral Economy and Energy.Research interests: mining, geology, mineral resources economy, mineral deposit management and mineral resources acquisition.Dr. eng. Eugeniusz J. SOBCZYK – scientific worker of Department of Mineral Resources Acquisition in Polish Academy of Sciences, Institute of Mineral Economy and Energy.Research interests: mining, geology, mineral resources economy, mineral deposit management and mineral resources acquisition.