@inproceedings{
author={Grabarczyk Paweł and Aarseth Espen},
year={2019},
publisher={DiGRA},
title={Port or conversion? An ontological framework for classifying game versions},
booktitle={DiGRA \&\#3919 - Proceedings of the 2019 DiGRA International Conference: Game, Play and the Emerging Ludo-Mix},
month={August},
url={http://www.digra.org/wp-content/uploads/digital-library/DiGRA_2019_paper_189.pdf}
}