Avila, Cecilia, Jorge Bacca, Josep Lluis de la Rosa, Silvia Baldiris, y Ramon Fabregat. 2012. «Social Presence Approach Within the Question and Answering ELearning Model: An Experiment With a Multi-Agent System». Respuestas 17 (1):27-34. https://doi.org/10.22463/0122820X.415.