鹿立江. THE LOCAL SOLVABILITY OF A CLASS OF PSEUDO-DIFFERENTIAL EQUATIONS OF PRINCIPAL TYPE[J]. 数学物理学报(英文版), 1986, 6(1): 25-36.
Lu Lijiang. THE LOCAL SOLVABILITY OF A CLASS OF PSEUDO-DIFFERENTIAL EQUATIONS OF PRINCIPAL TYPE[J]. Acta mathematica scientia,Series B, 1986, 6(1): 25-36.