TY - CONF T1 - Qualitative Velocity Model: Representation, Reasoning and Application T2 - Ninth International Workshop on Constraint Handling Rules (CHR) Y1 - 2012 A1 - Ester Martinez-Martin A1 - M.T. Escrig A1 - Angel P. del Pobil JF - Ninth International Workshop on Constraint Handling Rules (CHR) CY - Budapest, Hungary ER -