中国科学院数学与系统科学研究院期刊网
AMS
An Equivalent Condition for the Self Similar Sets on the Real Line to Have Best Coverings
Jian Dong YIN, Zuo Ling ZHOU
Acta Mathematica Sinica . 2013, (9): 1637 -1646 .  DOI: 10.1007/s10114-013-1348-4