@url{https://www.gnu.org/philosophy/pragmatic.html, copylefted}
@url{https://www.gnu.org/philosophy/free-sw.html, free software}:
licenced under @url{https://www.gnu.org/licenses/gpl-3.0.html, GPLv3}.
@url{https://www.gnu.org/philosophy/pragmatic.html, copylefted}
@url{https://www.gnu.org/philosophy/free-sw.html, free software}:
licenced under @url{https://www.gnu.org/licenses/gpl-3.0.html, GPLv3}.