DIFFUSIVE INSTABILITY IN A BENARD SYSTEM AT THE CRITICAL POINT FOR THE ONSET OF CONVECTION - Kraenkel, Roberto André [UNESP]; Kurcbart, S. M.; Pereira, J. G.; Manna, M. A.; Spatschek, K. H.; Mertens, F. G. (Plenum Press Div Plenum Publishing Corp, 1994)