中国科学院数学与系统科学研究院期刊网
Further Study on Size of Acyclic Hypergraphs
Zhao Lingqi, Feng Wei, Xu Chunlei, Jirimutu
Acta Mathematicae Applicatae Sinica . 2012, (5): 913 -917 .  DOI: 10.12387/C2012073