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Demonstratio Mathematica > 2022 > Vol. 55, nr 1 > 437--451
Journal of Applied Analysis > 2021 > Vol. 27, nr 1 > 153--162
Journal of Mathematical Sciences > 2019 > 241 > 3 > 290-305
Cybernetics and Systems Analysis > 2019 > 55 > 4 > 552-560
Journal of Mathematical Sciences > 2018 > 231 > 1 > 48-69
Commentationes Mathematicae > 2017 > Vol 57, No. 2 > 143--151
Czasopismo Techniczne. Nauki Podstawowe > 2014 > R. 111, z. 2-NP > 59--62
Commentationes Mathematicae > 2012 > 52 > 1
Schedae Informaticae > 2012 > Vol. 21 > 159--168
Journal of Applied Analysis > 2006 > Vol. 12, nr 1 > 19-36
Journal of Applied Analysis > 2005 > Vol. 11, nr 1 > 81-94
Journal of Applied Analysis > 2002 > Vol. 8, nr 1 > 63-82
Journal of Applied Analysis > 1999 > Vol. 5, nr 1 > 35-58