Is it worth using gamification on software testing education?: an extended experience report in the context of undergraduate students - Jesus, Gabriela Martins de; Ferrari, Fabiano Cutigi; Paschoal, Leo Natan; Souza, Simone do Rocio Senger de; Porto, Daniel de Paula; Durelli, Vinícius Humberto Serapilha (Journal of Software Engineering Research and Development, 2020)