@Article{JCM-37-i,
author = {},
title = {Preface},
journal = {Journal of Computational Mathematics},
year = {2019},
volume = {37},
number = {6},
pages = {i--ii},
abstract = {},
issn = {1991-7139},
doi = {https://doi.org/},
url = {http://global-sci.org/intro/article_detail/jcm/13385.html}
}