Marin Silviu Nan. "RESEARCH ON THE CONCEPTION AND DESIGN OF DIGGING A VENT WELL SITUATED IN A ISOLATED AND HARDLY ACCESSIBLE AREA." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining, 2018, pp. 761-768. https://doi.org/10.5593/sgem2018/1.3/s03.097