Eduardo Mangeli, Tadeu de Classe, Horácio Macêdo, Pedro Marques, Lincoln Costa, and Geraldo Xexéo. 2021.
 Games With Purpose Development Methodology by a Ludology Laboratory. In <em>Companion Proceedings of the 20th Brazilian Symposium on Games and Digital Entertainment</em>, October 18, 2021, Online, Brasil. SBC, Porto Alegre, Brasil, 143-151. DOI: <a href="https://doi.org/10.5753/sbgames_estendido.2021.19634">https://doi.org/10.5753/sbgames_estendido.2021.19634</a>.