@Article{MC-12-3,
author = {},
title = {封二},
journal = {数学文化},
year = {2021},
volume = {12},
number = {3},
pages = {0--0},
abstract = {},
issn = {2617-8656},
doi = {https://doi.org/2021-MC-19421},
url = {https://global-sci.com/article/89266/%E5%B0%81%E4%BA%8C}
}