On some problems of Borsuk
Volume 73 / 1972
                    
                    
                        Fundamenta Mathematicae 73 (1972), 271-274                    
                                        
                        DOI: 10.4064/fm-73-3-271-274                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            