@article{SisLab3903,
          volume = {4},
          number = {109},
           title = {M{\^o} ph{\h o}ng ho{\d a}t {\dj}?ng c{\h u}a gi?ng trong khai th{\'a}c d?u.},
          author = {Ngoc Hai Duong and The Ba Dang},
            year = {2007},
           pages = {7--17},
         journal = {T{\d a}p ch{\'i} Khoa h{\d o}c v{\`a} K{\~y} thu?t. H{\d o}c vi?n K{\~y} thu?t Qu{\^a}n s?.},
             url = {https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3903/}
}