TY - JOUR AU - CĂLUGĂREANU, GRIGORE TI - STRONGLY INVARIANT SUBGROUPS JO - Glasgow mathematical journal PY - 2015 SP - 431 EP - 443 VL - 57 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089514000391/ DO - 10.1017/S0017089514000391 ID - 10_1017_S0017089514000391 ER -