@Article{PedreiraFern√°ndez17,
author = {Pedreira, O. and García, F. and Piattini, M. and Cerdeira-Pena, A. and Penabad, M. R.},
title = {A Framework for Gamification in Software Engineering },
journal = {Journal of Systems and Software},
year = {2017},
pages = {21-40}
}