Johan A. Martens, Wim H. Verrelst, Georges M. Mathys, Stephen H. Brown, Pierre A. Jacobs "Tailored Catalytic Propene Trimerization over Acidic Zeolites with Tubular Pores" Angewandte Chemie International Edition Angewandte Chemie International Edition 2005, Volume 44, Issue 35, pages 5687-5690. doi:10.1002/anie.200463045