%0 Journal Article %T Tool Path Optimization for Computer Numerical Control Machines based on Parallel ACO %A Nataly Medina-Rodriguez %A Oscar Montiel-Ross %A Roberto Sepulveda %A Oscar Castillo %J Engineering Letters %D 2012 %I International Association of Engineers %U http://www.engineeringletters.com/issues_v20/issue_1/EL_20_1_13.pdf