@Misc{polymake,
  author =   "Ewgenij Gawrilow and Michael Joswig",
  title =   {polymake},
  howpublished = {{https://polymake.org}}
}


@Misc{polyhedral,
  author =   {Dutour Sikiric, Mathieu},
  title =        {Polyhedral},
  howpublished = {{http://www.liga.ens.fr/~dutour/Polyhedral/index.html}}
}



@Misc{hap,
  author =   {Graham Ellis},
  title =        {HAP},
  howpublished = {{http://hamilton.nuigalway.ie/Hap/www/}}
}


@Misc{cryst,
  author =   "Bettina Eick and Franz Gahler and Werner Nickel",
  title =        {cryst},
  howpublished = {{https://www.gap-system.org/Packages/cryst.html}}
}