@article {IOPORT.05893251,
    author       = {Frederickson, Greg N. and Wittman, Barry},
    title        = {Speedup in the traveling repairman problem with constrained time windows.},
    year         = {2011},
    journal      = {Computing Research Repository (CoRR)},
    volume       = {2011},
    pages        = {Article No. 1101.3960},
    publisher    = {Association for Computing Machinery, New York, NY; Cornell University, Ithaka, NY},
    identifier   = {05893251},
}