@article{3satproblemanewmemeticpsoalgorithm,
  title = {3-SAT Problem A New Memetic-PSO Algorithm},
  author = {Nasser Lotfi and Jamshid Tamouk and Mina Farmanbar},
  year = {2013},
  eprint = {1306.5070},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1306.5070v1},
}