@Article{MC-2-30,
author = {},
title = {回首来时路},
journal = {数学文化},
year = {2011},
volume = {2},
number = {3},
pages = {30--34},
abstract = {},
issn = {2617-8656},
doi = {https://doi.org/},
url = {http://global-sci.org/intro/article_detail/mc/11478.html}
}