@article {IOPORT.50244825,
    author       = {Marianov, Vladimir and Guti\'errez-Jarpa, Gabriel and Obreque, Carlos and Cornejo, Oscar},
    title        = {Lagrangean relaxation heuristics for the p-cable-trench problem},
    year         = {2012},
    journal      = {Computers & OR},
    volume       = {39},
    number       = {3},
    pages        = {620-628},
    doi          = {10.1016/j.cor.2011.05.015},
    identifier   = {50244825},
}