# Contributors

* Brett Alistair Kromkamp (brettkromkamp@gmail.com): Post basic idea online.
* Xiaming Chen (chenxm35@gmail.com): Finished primary parts and made the library freely public.
* Holger Bast (holgerbast@gmx.de): Replaced list with `dict` for fast node index and optimized the performance.
* Ilya Kuprik (ilya-spy@ynadex.ru): Added ZIGZAG tree-walk algorithm to tree traversal.

and other committers etc.

Thank you all.