S.M. Jesus sjesus@ualg.pt
LARSys, University of Algarve,
Campus de Gambelas, PT-8005-139 Faro, Portugal.
Comments: download pdf file.
Ref.: invited at SERENADE'14 Conference, Grenoble, France, November
2014.
Abstract
(to be inserted)
Acknowledgement: this work was supported under INP Grenoble invited professor grant.