Mathematical Notes
Mathematical Notes > 2004 > 76 > 5-6 > 758-769
Mathematical Notes > 2005 > 78 > 5-6 > 735-739
Mathematical Notes > 2014 > 96 > 3-4 > 465-476
Mathematical Notes > 2014 > 96 > 5-6 > 878-896
Mathematical Notes > 2015 > 98 > 3-4 > 572-588
Mathematical Notes > 2015 > 98 > 3-4 > 601-612
Mathematical Notes > 2016 > 99 > 1-2 > 222-242
Mathematical Notes > 2016 > 100 > 5-6 > 666-676