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Opuscula Mathematica > 2024 > Vol. 44, no. 4 > 565--585
Probability and Mathematical Statistics > 2023 > Vol. 43, Fasc. 2 > 247--262
Fundamenta Informaticae > 2019 > Vol. 167, nr 3 > 235--256
Fundamenta Informaticae > 2016 > Vol. 145, nr 2 > 171--187
Opuscula Mathematica > 2016 > Vol. 36, no. 4 > 489--498
Demonstratio Mathematica > 2015 > Vol. 48, nr 4 > 546--553
Journal of Mathematics and Applications > 2014 > Vol. 37 > 13--26
Commentationes Mathematicae > 2013 > Vol. 53, No. 2 > 313--319
Studia Informatica > 2013 > Vol. 34, nr 4 > 63--76
Fundamenta Informaticae > 2013 > Vol. 123, nr 3 > 365--380
Journal of Mathematics and Applications > 2013 > Vol. 36 > 35--62
Commentationes Mathematicae > 2011 > Vol. 51, [Z] 2 > 121-124
Zeszyty Naukowe Politechniki Rzeszowskiej. Budownictwo i Inżynieria Środowiska > 2011 > z. 58, nr 1 > 227-236
Demonstratio Mathematica > 2011 > Vol. 44, nr 3 > 473-479
Demonstratio Mathematica > 2009 > Vol. 42, nr 2 > 241-246
Opuscula Mathematica > 2008 > Vol. 28, no. 2 > 123-127
Fundamenta Informaticae > 2007 > Vol. 76, nr 4 > 413-447