TY - JOUR AU - Fong, C. K. TI - Range inclusion for normal derivations JO - Glasgow mathematical journal PY - 1984 SP - 255 EP - 262 VL - 25 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S001708950000567X/ DO - 10.1017/S001708950000567X ID - 10_1017_S001708950000567X ER -