Miskolc Mathematical Notes. A Publication of the University of Miskolc (Miskolc Math. Notes) (20220101), 23, no.~1, 363-380. ISSN: 1787-2405 (print).eISSN: 1787-2413.
Japan Journal of Industrial and Applied Mathematics (Jpn. J. Ind. Appl. Math.) (20220101), 39, no.~2, 573-598. ISSN: 0916-7005 (print).eISSN: 1868-937X.