Karim Lima, Rodrigo Figueiredo, Eduardo Martins, and Jean Schmith. 2021. Virtual lines for offside situations analysis in football. In Anais Estendidos do XXXIV Conference on Graphics, Patterns and Images, outubro 18, 2021, Online, Brasil. SBC, Porto Alegre, Brasil, 189-194. DOI: https://doi.org/10.5753/sibgrapi.est.2021.20037.