@inproceedings{sgem2006paper,
  title = {THE TECHNIQUE OF VERY LONG BASELINE INTERFEROMETRY (VLBI). FIRST RESULTS OF PROCESSING OF VLBI DATA IN BULGARIA},
  author = {I. Zdravchev and I. Ivanova},
  booktitle = {6th International Scientific Conference - SGEM},
  year = {2006},
  pages = {135-144},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}