About this article
Published Online: Dec 31, 2018
Page range: 25 - 40
DOI: https://doi.org/10.2478/disp-1996-0004
© 2019 João Cachopo, Ana Cardoso, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
João Cachopo
Sec. Sistemas - DEM Instituto Superior Técnico Av. Rovisco Pais, 1,Lisboa, Portugal
Ana Cardoso
Sec. Sistemas — DEM Instituto Superior Técnico Av. Rovisco Pais, 1,Lisboa, Portugal