@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/}
}