@article{MZ_1978__161_172702,
     author = {Karl Nickel},
     title = {Das {Lemma} von {Max} {M\"uller-Nagumo-Westphal} f\"ur stark gekoppelte {Systeme} parabolischer {Funktional-Differentialgleichungen.}},
     journal = {Mathematische Zeitschrift},
     pages = {221--234},
     publisher = {mathdoc},
     volume = {161},
     year = {1978},
     zbl = {0387.35063},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__161_172702/}
}