中国科学院数学与系统科学研究院期刊网
AMS
Global Existence for Some 4-D Quasilinear Wave Equations with Low Regularity
Meng Yun LIU, Cheng Bo WANG
Acta Mathematica Sinica . 2018, (4): 629 -640 .  DOI: 10.1007/s10114-017-7138-7