Carvalho E.S., Fernandes-Marcos A. (2019). Virtual Tutor: A Case of Study in University Aberta,
In Tatiana Antipova; Álvaro Rocha (Eds.), Book Advances in Intelligent Systems and Computing
(Digital Science), Vol. 850, pp. 465-471, Springer, Cham. Springer Book Doi: 10.1007/978-3-
030-02351-5_53.
http://hdl.handle.net/10400.2/7620