Leiming Xu, Chao Huang, Chunying Qu, Yi Zhang, Min Zhou and Ying Chen 2013. Easy and Effective Endoscopic Retrieval of Ingested Sharp Foreign Bodies. Journal of Basic & Applied Sciences. 9, (Jan. 2013), 87–90. DOI:https://doi.org/10.6000/1927-5129.2013.09.14.