URN:NBN:SI:doc-J5SHFWK91981Petkovšek, Markodocuments/doc/J/URN_NBN_SI_doc-J5SHFWK9_001.pdfdocuments/doc/J/URN_NBN_SI_doc-J5SHFWK9_001.txt48articlestr. 222, 250-2510351-66528019033URN:NBN:SI:doc-J5SHFWK9slvDruštvo matematikov, fizikov in astronomov SlovenijePresekInCEulerjeva formulakombinatorikamatematika