Deduction-preserving "Recursive Isomorphisms" between theories
Tom 61 / 1967
                    
                    
                        Fundamenta Mathematicae 61 (1967), 141-163                    
                                        
                        DOI: 10.4064/fm-61-2-141-163                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            