VORWORT Authors I. SZEBÉNYI Citation data from Crossref and Scopus PDF How to Cite SZEBÉNYI, I. “VORWORT”, Periodica Polytechnica Chemical Engineering, 25(4), p. 1, 1981. More Citation Formats Periodica Polytechnica Numbered ACM Chicago Harvard IEEE Vancouver Issue Vol. 25 No. 4 (1981) Section Articles