@article{ARM_1979__15_4_a7,
     author = {Perko, Richard},
     title = {Zur {Theorie} der partiellen {Differentialgleichungen} vom {Briot-Bouquet'schen} {Typ}},
     journal = {Archivum mathematicum},
     pages = {233--244},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {1979},
     mrnumber = {563152},
     zbl = {0429.35002},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/ARM_1979__15_4_a7/}
}