giws has been written for INRIA / Scilab by:
 - Sylvestre Ledru <sylvestre.ledru@inria.fr> or <sylvestre@ledru.info>
 - Vincent Couvert <vincent.couvert@inria.fr>
 - Jean-Baptiste Silvy <jean-baptiste.silvy@inria.fr>
 - Matthieu Walter <gamo@tecp.info>