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@article{MAN_1973__205_162479, author = {S.L.G. Choi}, title = {A {Direct} {Proof} of a {Theorem} of {Roth.}}, journal = {Mathematische Annalen}, pages = {1--8}, publisher = {mathdoc}, volume = {205}, year = {1973}, zbl = {0244.10040}, url = {http://geodesic.mathdoc.fr/item/MAN_1973__205_162479/} }
S.L.G. Choi. A Direct Proof of a Theorem of Roth.. Mathematische Annalen, Tome 205 (1973), pp. 1-8. http://geodesic.mathdoc.fr/item/MAN_1973__205_162479/