Date:             09/08/97
Value:            1450
Who:              Susanne Heipcke
Method:           CLP
Computation Time:  --
Machine:          Sun SparcStation 5, 32Mb memory

Date:             06/13/97
Value:            1221
Who:              Cristina C. B. Cavalcante and Cid Carvalho de Souza
Method:           Tabu Search
Computation time: 20min
Machine:          SUN SPARCstation