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@article{MAN_1970__184_161916, author = {Y.Ch. WONG}, title = {A {Short} {Proof} of {Schaefer's} {Theorem.}}, journal = {Mathematische Annalen}, pages = {155--156}, publisher = {mathdoc}, volume = {184}, year = {1970}, zbl = {0176.10502}, url = {http://geodesic.mathdoc.fr/item/MAN_1970__184_161916/} }
Y.Ch. WONG. A Short Proof of Schaefer's Theorem.. Mathematische Annalen, Tome 184 (1970), pp. 155-156. http://geodesic.mathdoc.fr/item/MAN_1970__184_161916/