@article{Dudkiewicz:2004,
  author  = "M. Dudkiewicz and P. Mackiewicz and M. Kowalczuk and D. Mackiewicz and A. Nowicka and N. Polak and K. Smolarczyk and J. Banaszak and M. Dudek and S. Cebrat",
  title   = "Simulation of gene evolution under directional mutational pressure",
  journal = "Physica A",
  volume  = "Vol. 336",
  pages   = "63--73",
  year    = "2004",
}