On generalised arithmetic and geometric progressions
Tom 40 / 1982
                    
                    
                        Acta Arithmetica 40 (1982), 255-262                    
                                        
                        DOI: 10.4064/aa-40-3-255-262                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            