@article{MZ_1969__109_171126,
     author = {Lynn Erbe},
     title = {A {Uniqueness} {Theorem} for {Second} {Order} {Differential} {Equations.}},
     journal = {Mathematische Zeitschrift},
     pages = {92--96},
     publisher = {mathdoc},
     volume = {109},
     year = {1969},
     zbl = {0172.10902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1969__109_171126/}
}