Mathematical Notes
Mathematical Notes > 2006 > 79 > 1-2 > 178-184
Mathematical Notes > 2006 > 79 > 5 > 886-891
Mathematical Notes > 2006 > 79 > 5-6 > 886-891
Mathematical Notes > 2006 > 80 > 3-4 > 550-562
Mathematical Notes > 2006 > 79 > 1-2 > 178-184
Mathematical Notes > 2006 > 79 > 5 > 886-891
Mathematical Notes > 2006 > 79 > 5-6 > 886-891
Mathematical Notes > 2006 > 80 > 3-4 > 550-562