Complementation in the lattice of Borel structures
Tom 51 / 1987
                    
                    
                        Colloquium Mathematicum 51 (1987), 5-8                    
                                        
                        DOI: 10.4064/cm-51-1-5-8                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            