libpgf is written by:

Krasimir Angelov <krasimir@chalmers.se>
Lauri Alanko <lealanko@ling.helsinki.fi>

with some contributions from:

Prasanth Kolachina <prasanth.kolachina@cse.gu.se>
Bjørnar Luteberget <luteberget@gmail.com>
