@inproceedings{sgem2013s09008,
  title = {APPROACHES ON GEOID MODELLING},
  author = {Dumitru, Paul and Plopeanu, Marin and Jocea, Andreea and Calin, Alexandru and Badescu, Octavian},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on INFORMATICS, GEOINFORMATICS AND REMOTE SENSING},
  year = {2013},
  pages = {57 - 64 pp},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2013/bb2.v2/s09.008}
}