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Mathematica Applicanda > 2022 > Vol. 50, no. 1 > 139--151
Journal of Applied Analysis > 2018 > Vol. 24, nr 1 > 27--33
Mathematica Applicanda > 2015 > Vol. 43, No. 2 > 291--303
Wiadomości Chemiczne > 2007 > [Z] 61, 7-8 > 625-640