@inproceedings{sgem2008paper,
  title = {COMPARISON OF MACHINE UTILIZATION TIME AND PERFORMANCE FOR ROADHEADER AND IMPACT HAMMER IN KADIKOY-KARTAL METRO TUNNELS (ISTANBUL)},
  author = {I. Ocak},
  booktitle = {8th International Scientific Conference - SGEM2008},
  year = {2008},
  pages = {269-276},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}