@software{fdlibm:software,
       key = {FDLIBM},
      type = {free C library},
      note = {The ``Freely Distributable LIBM'' package provides implementations of standard
              elementary functions plus a few higher functions, e.g. gamma.
              Double precision, maximum accuracy 20S.
              Developed by Sun Microsystems.},
     links = {\GAMSpackage{FDLIBM}}}