%0 Journal Article %A Cassels, J. W. S. %T A diophantine equation %J Glasgow mathematical journal %D 1985 %P 11-18 %V 26 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500006030/ %R 10.1017/S0017089500006030 %F 10_1017_S0017089500006030