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@article{MM2_1971__4_154046, author = {Volker Eberhardt}, title = {Der {Graphensatz} von {A.} {P.} und {W.} {Robertson} f\"ur {S-R\"aume.}}, journal = {Manuscripta mathematica}, pages = {255--262}, publisher = {mathdoc}, volume = {4}, year = {1971}, language = {de}, url = {http://geodesic.mathdoc.fr/item/MM2_1971__4_154046/} }
Volker Eberhardt. Der Graphensatz von A. P. und W. Robertson für S-Räume.. Manuscripta mathematica, Tome 4 (1971), pp. 255-262. http://geodesic.mathdoc.fr/item/MM2_1971__4_154046/