R. FIEDROROW: 'The nature of coke-forming centres on alumina catalyst for oxidative dehydrogenation of ethylbenzene', STUDIES IN SURFACE SCIENCE AND CATALYSIS, 30 June 1980 (1980-06-30) - 4 July 1980 (1980-07-04), pages 1450 - 1451, XP009171750, ISBN: 978-0-444-99739-5