1. J. H. Blanc, J. Tellier, C. Thibadlt and Y. M. Philardeau, 5th Canadian Symposium on Catalysis, CALGARY, Alberta, October 26–27, 1977
2. CNGPA Research Seminar;Graulier,1974
3. Z. M. George, Symposium on catalyst degradation, poisoning, sintering and restructuring, CHICAGO, August 28, 1977