On projections and unconditional bases in direct sums of Banach spaces II
Volume 62 / 1978
                    
                    
                        Studia Mathematica 62 (1978), 193-201                    
                                        
                        DOI: 10.4064/sm-62-2-193-201                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            