@Article{MC-8-2, author = {}, title = {封三}, journal = {数学文化}, year = {2017}, volume = {8}, number = {2}, pages = {0--0}, abstract = {}, issn = {2617-8656}, doi = {https://doi.org/2017-MC-11977}, url = {https://global-sci.com/article/89560/%E5%B0%81%E4%B8%89} }