On a problem of sums of mixed powers
Volume 58 / 1991
                    
                    
                        Acta Arithmetica 58 (1991), 89-102                    
                                        
                        DOI: 10.4064/aa-58-1-89-102                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            