In Pérez Ríos (2008b) can be seen the evolution of the different versions of VSMod®, starting with the first version presented by Pérez Ríos to S. Beer in year 2001 until present, as well as the user´s manual of the actual version 1.3 wich is made available for academic and research use.

To see how to obtain a permission to access the page and to download the software please go to the page Download Software.