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Open Mathematics > 2017 > 15 > 1 > 233-237
Concrete Operators > 2017 > 4 > 1 > 1-6
Annales UMCS, Mathematica > 2014 > 68 > 2
Open Mathematics > 2015 > 13 > 1
Open Mathematics > 2015 > 13 > 1
Annales UMCS, Mathematica > 2013 > 67 > 2 > 53-58
Annales UMCS, Mathematica > 2011 > 65 > 1 > 97-108
Annales UMCS, Mathematica > 2010 > 64 > 1 > 1-16
Annales UMCS, Mathematica > 2010 > 64 > 2 > 1-14
Annales Polonici Mathematici > 1997 > 66 > 1 > 37-42
Annales Polonici Mathematici > 1994-1995 > 60 > 2 > 159-162
Annales Polonici Mathematici > 1992 > 57 > 2 > 149-155
Rozprawy Matematyczne