On the reduction theorems
Tom 26 / 1972
                    
                    
                        Annales Polonici Mathematici 26 (1972), 125-133                    
                                        
                        DOI: 10.4064/ap-26-2-125-133                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            