Maruta, M. “Possibility of Using a Portable Multi-Gas Detector Dräger X-Am 8000 for Monitoring Explosive Gases in the Area of Historical Oil and Gas Mines in the Podkarpackie Region”. Journal of Geotechnology and Energy, vol. 38, no. 2, Aug. 2021, doi:10.7494/jge.2021.38.2.4352.