Date: 09/08/97 Value: 125 Who: Susanne Heipcke Method: CLP Computation Time: 94.1 s Machine: Sun SparcStation 5, 32Mb memory Date: 06/13/97 Value: 114 Who: Cristina C. B. Cavalcante and Cid Carvalho de Souza Method: Tabu Search Computation time: 2 s Machine: SUN SPARCstation