L. Capelão, E. Oliveira, R. Dias, and E. Bernardino. " Evaluation of UFMG Virtual from the point of view of deaf students from the perspective of Semiotic Engineering", in Proceedings of the 26th Brazilian Symposium on Computers in Education, Maceió/AL, 2015, pp. 857-866, doi: https://doi.org/10.5753/cbie.sbie.2015.857.