陈恕行. THE EQUIVALUED BOUNDARY VALUE PROBLEMS FOR THE MINIMAL SURFACE EQUATION[J]. 数学物理学报(英文版), 1984, 4(4): 471-479.
Chen shuxing. THE EQUIVALUED BOUNDARY VALUE PROBLEMS FOR THE MINIMAL SURFACE EQUATION[J]. Acta mathematica scientia,Series B, 1984, 4(4): 471-479.