中国科学院数学与系统科学研究院期刊网
The Cross-ratio Compactification of the Configuration Space of Ordered Points on ?
Risako FUNAHASHI, Masahiko TANIGUCHI
Acta Mathematica Sinica . 2012, (10): 2129 -2138 .  DOI: 10.1007/s10114-012-1185-x