Published Online: Dec 31, 2018
Page range: 271 - 277
DOI: https://doi.org/10.2478/disp-2005-0013
© 2005 Axel Gosseries, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Axel Gosseries
Fonds National de la Recherche Scientifique
Université Catholique de LouvainLouvain-la-Neuve, Belgium