%0 Journal Article %A Beazer, R. %T Some p-algebras and double p-algebras having only principal congruences %J Glasgow mathematical journal %D 1992 %P 157-164 %V 34 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008673/ %R 10.1017/S0017089500008673 %F 10_1017_S0017089500008673