Date:             09/08/97
Value:            1647
Who:              Susanne Heipcke
Method:           CLP
Computation Time: 45.8 s
Machine:          Sun SparcStation 5, 32Mb memory

Date:             06/13/97
Value:            1415
Who:              Cristina C. B. Cavalcante and Cid Carvalho de Souza
Method:           Tabu Search
Computation time: 20 m
Machine:          SUN SPARCstation