On maximal and complete regions
Tom 32 / 1974
                    
                    
                        Colloquium Mathematicum 32 (1974), 119-125                    
                                        
                        DOI: 10.4064/cm-32-1-119-125                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            