@Article{JCM-7-98,
author = {},
title = {Preface},
journal = {Journal of Computational Mathematics},
year = {1989},
volume = {7},
number = {2},
pages = {98--99},
abstract = {},
issn = {1991-7139},
doi = {https://doi.org/},
url = {http://global-sci.org/intro/article_detail/jcm/10211.html}
}