中国科学院数学与系统科学研究院期刊网
JSSC
A CONNECTED GRAPH IS PATH-POSITIVE IFF ITS SPECTRAL RADIUS IS AT LEAST TWO
SHI Ronghua
A CONNECTED GRAPH IS PATH-POSITIVE IFF ITS SPECTRAL RADIUS IS AT LEAST TWO
SHI Ronghua
Journal of Systems Science and Complexity . 1996, (4): 320 -325 .