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1by Fiol, Miquel Àngel; Departament de Matem\`atiques, Universitat Polit\' ecnica de Catalunya, Barcelona Graduate School of Mathematics, Catalonia, Spain, Penjic, Safet; Andrej Maru\v{s}i\v{c} Institute, University of Primorska, Muzejski trg 2 6000 Koper, SloveniaGet Fulltext
Published 2020
EJournal Article