@article{NUMA_1990__58_5_133489,
     author = {A.K. Aziz and M. Schneider and R. Lemmert},
     title = {A finite element method for the nonlinera {Tricomi} problem.},
     journal = {Numerische Mathematik},
     pages = {95--108},
     publisher = {mathdoc},
     volume = {58},
     number = {5},
     year = {1990},
     zbl = {0712.65094},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1990__58_5_133489/}
}