@inproceedings{sgem2021s0945,
  title = {ESTIMATION OF NORMAL AND GEOPOTENTIAL HEIGHT DIFFERENCES DERIVED BY GRAVITY DATA FROM GLOBAL GEOPOTENTIAL MODELS FOR THE TERRITORY OF BULGARIA},
  author = {Tatyana Lambeva},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Informatics, Geoinformatics and Remote Sensing},
  year = {2021},
  pages = {155-166},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2021/2.1/s09.45}
}