@article{guo_cao_sang_wang_zhang_feng_2021,  title={CBM drilling technical parameter optimization methodology and software development: a case study of LUAN mining area},  volume={93},  ISSN={0001-3765},  url={https://doi.org/10.1590/0001-3765202120190346},  DOI={10.1590/0001-3765202120190346},  number={1},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={GUO, YULIANG and CAO, LIWEN and SANG, SHUXUN and WANG, YONG and ZHANG, XUEZHE and FENG, XUEHAN},  year={2021},  pages={e20190346} }