中国科学院数学与系统科学研究院期刊网
THE SET EXPONENT OF SYMMETRIC PRIMITIVE DIGRAPHS AND THE EXTREMAL GRAPHS OF THE $K$TH UPPER GENERALIZED EXPONENT FOR
She Xi CHEN
Acta Mathematicae Applicatae Sinica . 2005, (2): 243 -252 .  DOI: 10.12387/C2005025