@inproceedings{sgem2020s22100,
  title = {OPPORTUNITIES FOR OPERATIONALIZING THE PRINCIPLE FOR SUSTAINABLE DEVELOPMENT IN GEOGRAPHY TRAINING},
  author = {Maya Vasileva},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Ecology, Economics, Education and Legislation},
  year = {2020},
  pages = {813-820},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2020/5.2/s22.100}
}