Convergents of folded continued fractions
Tom 77 / 1996
                    
                    
                        Acta Arithmetica 77 (1996), 77-96                    
                                        
                        DOI: 10.4064/aa-77-1-77-96                    
                                    
                                                                
                             
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            