Mean square value of exponential sums related to representation of integers as sum of two squares
Volume 68 / 1994
                    
                    
                        Acta Arithmetica 68 (1994), 71-84                    
                                        
                        DOI: 10.4064/aa-68-1-71-84                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            