中国科学院数学与系统科学研究院期刊网
AMS
Projectively Flat Singular Square Metrics with Constant Flag Curvature
Guang Zu CHEN, Xin Yue CHENG
Acta Mathematica Sinica . 2020, (6): 638 -650 .  DOI: 10.1007/s10114-020-9310-8