@article{ahybridbatalgorithm,
  title = {A hybrid bat algorithm},
  author = {Iztok Fister Jr. and Dušan Fister and Xin-She Yang},
  year = {2013},
  eprint = {1303.6310},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1303.6310v3},
}