@article {IOPORT.05756150,
    author       = {Caballero-Gil, Pino and F\'uster-Sabater, Amparo and Pazo-Robles, Maria Eugenia},
    title        = {Using linear difference equations to model nonlinear cryptographic sequences.},
    year         = {2010},
    journal      = {Computing Research Repository (CoRR)},
    volume       = {2010},
    pages        = {Article No. 1005.0108},
    publisher    = {Association for Computing Machinery, New York, NY; Cornell University, Ithaka, NY},
    identifier   = {05756150},
}