Search results
Commentationes Mathematicae > 2012 > 52 > 2
Open Mathematics > 2009 > 7 > 3 > 550-557
Annales UMCS, Mathematica > 2009 > 63 > 1 > 55-62
Annales UMCS, Mathematica > 2008 > 62 > 1 > 61-65
Commentationes Mathematicae > 2007 > 47 > 1
Commentationes Mathematicae > 2006 > 46 > 2
International Journal of Applied Mathematics and Computer Science > 2002 > 12 > 4 > 533-538
Studia Mathematica > 1997 > 124 > 2 > 107-132
Annales Polonici Mathematici > 1996 > 63 > 3 > 247-272