%0 Journal Article %A Evan, Joseph %T PERMUTABLE DIAGONAL-TYPE SUBGROUPS OF $G\times H$ %J Glasgow mathematical journal %D 2003 %P 73-77 %V 45 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089502001003/ %R 10.1017/S0017089502001003 %F 10_1017_S0017089502001003