@inproceedings{sgem2009paper,
  title = {DRILLING FLUID CHALLENGES FOR OIL-WELL DEEP DRILLING},
  author = {V. C. Kelessidis},
  booktitle = {9th International Multidisciplinary Scientific GeoConference SGEM2009},
  year = {2009},
  pages = {595-604},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}