@article{MOMA_1975__79_177682,
     author = {Ludwig Reich},
     title = {\"Uber den {Satz} von {Poincar\'e} in der {St\"orungstheorie} {Briot-Bouquetscher} {Differentialgleichungen.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {139--146},
     publisher = {mathdoc},
     volume = {79},
     year = {1975},
     zbl = {0302.34003},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1975__79_177682/}
}