Arithmetical properties of the values of functions satisfying certain functional equations of Poincaré
Tom 99 / 2001
                    
                    
                        Acta Arithmetica 99 (2001), 389-407                    
                                        
                        MSC: Primary 11J72; Secondary 11J82.                    
                                        
                        DOI: 10.4064/aa99-4-6