TY - JOUR AU - E. M. Giannacoulias TI - Compositions of operators with vector valued maps JO - Ευκλείδης Γ PY - 1990 SP - 41 EP - 45 VL - 26 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EUG_1990__26_a2/ LA - gr ID - EUG_1990__26_a2 ER -