中国科学院数学与系统科学研究院期刊网
On Locally Countable Networks and Strong s-Mappings
Jin Jing LI(1),Shou Li JIANG(2
Acta Mathematica Sinica, Chinese Series . 1999, (5): 827 -832 .  DOI: 10.12386/A1999sxxb0112