@software{gsl:software,
       key = {GSL},
      type = {free C library},
     title = {GNU Scientific Library},
organization = {The \URL[GNU Project]{http://www.gnu.org/}},
      note = {The GNU Scientific Library is a large general purpose numerical software library
              with broad coverage of elementary and special functions.
              Implementation is in double precision.},
     links = {\URL[Home Page]{http://www.gnu.org/software/gsl/}}}