@Book{GSL2003,
  author = 	 {Galassi, Mark and Davies, Jim and Theiler, James and Gough, Brian and Jungman, Gerard and Booth, Michael and Rossi, Fabrice},
  title = 	 {GNU Scientific Library Reference Manual},
  publisher = 	 {Network Theory Ltd.},
  year = 	 2003,
  edition = 	 {Second},
  month = 	 {February}
}