中国科学院数学与系统科学研究院期刊网
Optimal method of credit rating division based on maximum credit difference degree
ZHAO Zhichong, CHI Guotai, PAN Mingdao
Systems Engineering - Theory & Practice . 2017, (10): 2539 -2554 .  DOI: 10.12011/1000-6788(2017)10-2539-16