@article{NUMA_1989__56_2-3_133406,
     author = {Harald Berger},
     title = {A {Convergent} {Finite} {Elemet} {Formulation} for {Transonic} {Flow.}},
     journal = {Numerische Mathematik},
     pages = {425--448},
     publisher = {mathdoc},
     volume = {56},
     number = {2-3},
     year = {1989},
     zbl = {0681.76066},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1989__56_2-3_133406/}
}