On a theorem in the theory of relations and a solution of a problem of Knaster
Volume 8 / 1961
                    
                    
                        Colloquium Mathematicum 8 (1961), 19-21                    
                                        
                        DOI: 10.4064/cm-8-1-19-21                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            