@article{zhu_li_li_zhang_wang_ji_2013,  title={Transumbilical endoscopic cholecystectomy in a porcine model},  volume={28},  ISSN={0102-8650},  url={https://doi.org/10.1590/S0102-86502013001100003},  DOI={10.1590/S0102-86502013001100003},  number={11},  journal={Acta Cirúrgica Brasileira},  publisher={Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia},  author={Zhu, Hong-Yi and Li, Fu and Li, Ke-Wei and Zhang, Xi-Wen and Wang, Jian and Ji, Fu},  year={2013},  month={Nov},  pages={762–766} }