Date: 09/08/97 Value: 127 Who: Susanne Heipcke Method: CLP Computation Time: 124.6 s Machine: Sun SparcStation 5, 32Mb memory Date: 06/13/97 Value: 117 Who: Cristina C. B. Cavalcante and Cid Carvalho de Souza Method: Tabu Search Computation time: 1 m 55 s Machine: SUN SPARCstation