Mathematical Notes
Mathematical Notes > 2003 > 74 > 3-4 > 425-437
Mathematical Notes > 2003 > 74 > 5-6 > 761-771
Mathematical Notes > 2003 > 74 > 5-6 > 794-802
Mathematical Notes > 2003 > 74 > 3-4 > 425-437
Mathematical Notes > 2003 > 74 > 5-6 > 761-771
Mathematical Notes > 2003 > 74 > 5-6 > 794-802