TY - JOUR AU - P. Wojaszczyk TI - On projections and unconditional bases in direct sums of Banach spaces II JO - Studia Mathematica PY - 1978 SP - 193 EP - 201 VL - 62 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-62-2-193-201/ DO - 10.4064/sm-62-2-193-201 LA - en ID - 10_4064_sm_62_2_193_201 ER -