About this article
Published Online: Dec 31, 2018
Page range: 851 - 867
DOI: https://doi.org/10.2478/disp-2012-0034
© 2012 Rui Silva, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Rui Silva
University of the Azores and LanCog Group,