LohmanM77'

@article{DBLP:journals/tods/LohmanM77,
  author    = {Guy M. Lohman and
               John A. Muckstadt},
  title     = {Optimal Policy for Batch Operations: Backup, Checkpointing,
               Reorganization, and Updating},
  journal   = {ACM Trans. Database Syst.},
  volume    = {2},
  number    = {3},
  year      = {1977},
  pages     = {209-222},
  ee        = {http://doi.acm.org/10.1145/320557.320558},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}