1. M. I. Levinbuk, Neftegaz. Vertikal, No. 17, 21 (2001).
2. Andrew Hollet, World Refining, No. 6, 16 (2004).
3. J. Hiltunen, V. M. Niemi, and K. Lipiainen, et al., in Fluid Catalytic Cracking V, Materials and Technological Innovation, Ed. by M. L. Occelli and P. O’Connor, 134 122 (2001).
4. M. Koskinen, M. Sourander, and M. Nurminen, Hydrocarbon Process, February, 81 (2006).
5. R. Sandrea, Oil&Gas J. July 28, 103, 31 (2003).