Rank theory of modules
Tom 64 / 1969
                    
                    
                        Fundamenta Mathematicae 64 (1969), 313-324                    
                                        
                        DOI: 10.4064/fm-64-3-313-324                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            