Gapys, Anna. “Analysis of Shale Gas Exploration and Production Regulations - Lessons from Poland, Canada and the US”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 1(925), Nov. 2015, pp. 57-72, https://doi.org/10.15678/ZNUEK.2014.0925.0104.