中国科学院数学与系统科学研究院期刊网
Investigating the Disparities of China's Insurance Market Based on Minimum Spanning Tree from the Viewpoint of Geography and Enterprise
Chi XIE, Yingying ZHOU, Gangjin WANG, Xinguo YAN
Journal of Systems Science and Information . 2017, (3): 216 -228 .  DOI: 10.21078/JSSI-2017-216-13