中国科学院数学与系统科学研究院期刊网
AMS
Local Isoperimetric Inequalities for Sectors on Surfaces and Cones
Fernando GIMÉNEZ, Javier Orengo VALVERDE
Acta Mathematica Sinica . 2007, (7): 1317 -1326 .  DOI: 10.1007/s10114-005-0826-8