Linear equations with the Euler totient function
Volume 128 / 2007
                    
                    
                        Acta Arithmetica 128 (2007), 135-147                    
                                        
                        MSC: 11D04, 11D45, 11K65, 11L20, 11N35, 11N37.                    
                                        
                        DOI: 10.4064/aa128-2-4