AMS-IMS-SIAM Joint Summer Research Conference in the Mathematical Sciences on Current Progress in Hyperbolic Systems: Riemann Problems and Computations (1988 : Bowdoin College), issuing body.
Providence, Rhode Island : American Mathematical Society, [1989]
Norske videnskaps-akademi. Research Program on Nonlinear Partial Differential Equations (2008-2009 : Centre for Advanced Study of the Norwegian Academy of Sciences and Letters), issuing body.
Providence, Rhode Island : American Mathematical Society, [2010]