Results in Mathematics
Results in Mathematics > 1999 > 36 > 1-2 > 69-74
Results in Mathematics > 2002 > 42 > 1-2 > 69-73
Results in Mathematics > 2010 > 57 > 3-4 > 205-219
Results in Mathematics > 2011 > 59 > 3-4 > 213-218
Results in Mathematics > 2014 > 65 > 3-4 > 361-369