@Article{MC-10-3, author = {}, title = {封面}, journal = {数学文化}, year = {2019}, volume = {10}, number = {3}, pages = {0--0}, abstract = {}, issn = {2617-8656}, doi = {https://doi.org/2019-MC-13291}, url = {https://global-sci.com/article/89421/%E5%B0%81%E9%9D%A2} }