Mathematical Notes
Mathematical Notes > 2001 > 69 > 1-2 > 81-87
Mathematical Notes > 2003 > 73 > 1-2 > 110-124
Mathematical Notes > 2003 > 73 > 5-6 > 796-801
Mathematical Notes > 2005 > 78 > 3-4 > 447-455
Mathematical Notes > 2006 > 80 > 1-2 > 305-308
Mathematical Notes > 2008 > 84 > 3-4 > 568-583
Mathematical Notes > 2013 > 94 > 3-4 > 508-523
Mathematical Notes > 2018 > 104 > 5-6 > 683-688
Mathematical Notes > 2019 > 106 > 1-2 > 156-159