• Preparation of the catalyst support from the oil-shale processing by-productPerez-Caballero, Fernando; Peikolainen, Anna-Liisa; Koel, Mihkel; Herbert, M.; Galindo, A.; Montilla, F.The open petroleum engineering journal2008 / p. 42-46 https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=bb52295bcd2bc43fe5b0478476c6faeeda31843c