Mathematical Notes
Mathematical Notes > 2013 > 94 > 1-2 > 115-126
Mathematical Notes > 2013 > 94 > 3-4 > 532-546
Mathematical Notes > 2013 > 94 > 3-4 > 364-368
Mathematical Notes > 2013 > 94 > 5-6 > 722-813
Mathematical Notes > 2015 > 97 > 1-2 > 230-242
Mathematical Notes > 2015 > 97 > 3-4 > 423-430
Mathematical Notes > 2015 > 97 > 5-6 > 909-918
Mathematical Notes > 2016 > 99 > 5-6 > 711-714
Mathematical Notes > 2016 > 100 > 3-4 > 413-420
Mathematical Notes > 2017 > 101 > 1-2 > 100-114