%0 Journal Article %A Klotz, W. %T Arithmetic progressions in finite sets of real numbers %J Glasgow mathematical journal %D 1973 %P 101-104 %V 14 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500001828/ %R 10.1017/S0017089500001828 %F 10_1017_S0017089500001828