Ergodic projections for semi-groups of periodic operators
Tom 17 / 1958
                    
                    
                        Studia Mathematica 17 (1958), 189-197                    
                                        
                        DOI: 10.4064/sm-17-2-189-197                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            