N. Cavalcante, F. Amâncio, E. Jucá, and M. Rodrigues.
" Use of gamification as an aid to process improvement: experience report", in <em>Proceedings of the 14th Brazilian Symposium on Software Quality</em>, Manaus, 2015, pp. 268-275, doi: <a href="https://doi.org/10.5753/sbqs.2015.15232">https://doi.org/10.5753/sbqs.2015.15232</a>.