中国科学院数学与系统科学研究院期刊网
Regularity of Degenerate Weak (L_1,L_2)-BLD Mappings
Ju Ling LI(1), Hong Ya GAO(2)
Acta Mathematica Sinica, Chinese Series . 2004, (6): 1107 -111 .  DOI: 10.12386/A2004sxxb0137