@article{MZ_1986__191_173677,
     author = {Wolfgang Walter},
     title = {Parabolic {Differential} {Equations} and {Inequalities} with {Several} {Time} {Variables.}},
     journal = {Mathematische Zeitschrift},
     pages = {319--324},
     publisher = {mathdoc},
     volume = {191},
     year = {1986},
     zbl = {0612.35075},
     url = {http://geodesic.mathdoc.fr/item/MZ_1986__191_173677/}
}