Symposium on Aerodynamics & Aeroacoustics : Tucson, Arizona, March 1 - 2, 1993
Workshop on Traffic and Granular Flow : HLRZ, Forschungszentrum Jülich, Germany October 9-11, 1995
Workshop on Traffic and Granular Flow : HLRZ, Forschungszentrum Jülich, Germany October 9-11, 1995