@article{atabusearchalgorithmwithefficient,
  title = {A tabu search algorithm with efficient diversification strategy for high school timetabling problem},
  author = {Salman Hooshmand and Mehdi Behshameh and Omid Hamidi},
  year = {2013},
  eprint = {1309.3285},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1309.3285v1},
}