@article{JDM_1973__75_146628,
     author = {R. Reissig},
     title = {Phasenraum-Methoden zum {Studium} nichtlinearer {Differentialgleichungen.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {130--139},
     publisher = {mathdoc},
     volume = {75},
     year = {1973},
     zbl = {0287.34053},
     url = {http://geodesic.mathdoc.fr/item/JDM_1973__75_146628/}
}