@Article{MC-14-4, author = {}, title = {封二}, journal = {数学文化}, year = {2023}, volume = {14}, number = {4}, pages = {0--0}, abstract = {}, issn = {2617-8656}, doi = {https://doi.org/2023-MC-22175}, url = {https://global-sci.com/article/89143/%E5%B0%81%E4%BA%8C} }