On line-symmetric graphs
Tom 122 / 1984
                    
                    
                        Fundamenta Mathematicae 122 (1984), 1-21                    
                                        
                        DOI: 10.4064/fm-122-1-1-21                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            