%0 Journal Article %A CĂLUGĂREANU, GRIGORE %T STRONGLY INVARIANT SUBGROUPS %J Glasgow mathematical journal %D 2015 %P 431-443 %V 57 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089514000391/ %R 10.1017/S0017089514000391 %F 10_1017_S0017089514000391