A note on representation of positive definite binary quadratic forms by positive definite quadratic forms in 6 variables
Tom 54 / 1990
                    
                    
                        Acta Arithmetica 54 (1990), 317-322                    
                                        
                        DOI: 10.4064/aa-54-4-317-322                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            