Umbelino, M., & 		Mota, R.
(2021).
 Negativity in Play - How Negative Emotions create Meaningful Games.
In <em>Companion Proceedings of the 20th Brazilian Symposium on Games and Digital Entertainment</em>, (pp. 152-161). Porto Alegre: SBC.
doi:10.5753/sbgames_estendido.2021.19635