1. (Rev) B. Delmon, in:Catalysts in Petroleum Refining 1989, eds. D.L. Trimm, S. Akashah, M. Absi-Halabi and A. Bishara (Elsevier, Amsterdam, 1990) pp. 1–40.
2. P.C.H. Mitchell, ed.,Hydrodemetallisation Catalysts, Catal. Today 7 (4) (1990).
3. M. Breysse and S. Szabo, eds.,New Development in Hydrodenitrogenation, Catal. Today 10 (4) (1991).
4. P. Grange, ed.,IVth Workshop on Hydrotreatment, 21–22 Nov. 1991, Bull. Soc. Chim. Belg. 100(1991) 767–991.
5. A. Nishijima et al., eds.,Proc. 1st Japan-EC Workshop on the Frontiers of Catalytic Science and Technology for Alternative Energy and Global Environmental Protection JECA T '91 (JITA and RITE, Tokyo, 1991).