About this article
Published Online: Dec 31, 2018
Page range: 609 - 624
DOI: https://doi.org/10.2478/disp-2012-0023
Keywords
© 2012 Fernando Ferreira, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Ferreira, Fernando
University of Lisbon