@inproceedings{sgem2026paper,
  title = {COMPARATIVE ANALYSIS OF LOCAL QUASI-GEOID MODELS APPLICATION IN BULGARIA THROUGH DIRECT GNSS AND LEVELLING MEASUREMENTS},
  author = {Elena Peneva and Yuri Tsanovski and Georgi Mihaylov},
  booktitle = {SWS 2026 Conference Preprints},
  year = {2026},
  pages = {},
  publisher = {STEF92 Technology},
  doi = {}
}