Saulo Zambiasi and Ricardo Rabelo. 2010.
 A Reference Architecture for Personal Assistants: An Agent-Based Approach with Software Services. In <em>Proceedings of the 4th Workshop-School on Agents, Environments, and Applications</em>, April 19, 2010, Rio Grande/RS, Brasil. SBC, Porto Alegre, Brasil, 111-122. DOI: <a href="https://doi.org/10.5753/wesaac.2010.33058">https://doi.org/10.5753/wesaac.2010.33058</a>.