Date:             09/08/97
Value:            344
Who:              Susanne Heipcke
Method:           CLP
Computation Time: 9.6 s
Machine:          Sun SparcStation 5, 32Mb memory

Date:             06/13/97
Value:            310
Who:              Cristina C. B. Cavalcante and Cid Carvalho de Souza
Method:           Tabu Search
Computation time: 15 m 26 s
Machine:          SUN SPARCstation