Search results for: S. Wąsowicz
Opuscula Mathematica > 2015 > Vol. 35, no. 3 > 411--419
Demonstratio Mathematica > 2013 > Vol. 46, nr 4 > 655--662
Opuscula Mathematica > 2012 > Vol. 32, no. 3 > 591-600
Opuscula Mathematica > 2011 > Vol. 31, no. 1 > 97-103