@article{MM2_1988__61_4_155323,
     author = {Jindrich Necas and Miloslav Feistauer},
     title = {Remarks on the {Solvability} of {Transonic} {Flow} {Problems.}},
     journal = {Manuscripta mathematica},
     pages = {417--428},
     publisher = {mathdoc},
     volume = {61},
     number = {4},
     year = {1988},
     zbl = {0661.76054},
     url = {http://geodesic.mathdoc.fr/item/MM2_1988__61_4_155323/}
}