@article{MAN_1964__155_161199,
     author = {A. Dinghas},
     title = {\"Uber einige {Konvexit\"atsfragen} bei partiellen {Differentialgleichungen} vom {Sturmschen} {Typus.}},
     journal = {Mathematische Annalen},
     pages = {397--421},
     publisher = {mathdoc},
     volume = {155},
     year = {1964},
     zbl = {0161.31601},
     url = {http://geodesic.mathdoc.fr/item/MAN_1964__155_161199/}
}