中国科学院数学与系统科学研究院期刊网
The Problems in the Definition of Fuzzy Subordinative Degree
Kai Di LIU;Yan Jun PANG;He Qin WU;Li gen YAO
Systems Engineering - Theory & Practice . 2000, (1): 110 -112 .  DOI: 10.12011/1000-6788(2000)1-110