1. Modeling and Scientific Computing; MATHICSE, École Polytechnique Fédérale de Lausanne; CH-1015 Lausanne Switzerland
2. Nonlinear Physics and Mathematical Modeling Lab; University Campus Bio-Medico of Rome; I-00128 Rome Italy
3. MOX - Politecnico di Milano, piazza Leonardo da Vinci 32; 20133 Milano Italy
4. Institute of Earth Sciences, FGSE; University of Lausanne; CH-1015 Lausanne Switzerland