@article{JRAM_1962__211_150550,
     author = {Karl Nickel},
     title = {Gestaltaussagen \"uber {L\"osungen} parabolischer {Differentialgleichungen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {78--94},
     year = {1962},
     volume = {211},
     zbl = {0127.31801},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1962__211_150550/}
}