Y. Traa. Preprints of the Conference "Future Feedstocks for Fuels and Chemicals", 2008,3, page 59-66. Hamburg, Dt. Wiss. Ges. für Erdöl, Erdgas und Kohle, (2008)
I. Kley, S. Rezai, and Y. Traa. Zeolites and related materials : trends, targets and challenges : proceedings of the 4th International FEZA Conference, 174, page 1119-1122. Amsterdam, Elsevier, (2008)
J. Weitkamp, S. Rabl, A. Haas, M. Ferrari, and V. Calemma. Preprints of the DGMK-Conference "The future role of hydrogen in petrochemistry and energy supply", 2010,3, page 77-86. Berlin, DGMK, (2010)