@inproceedings{sgem2018s28004,
  title = {ALTERNATIVE ENERGY SOURCES USED IN POLAND},
  author = {A. Konstanciak},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation},
  year = {2018},
  pages = {27-34},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2018/5.3/s28.004}
}