1. Universidad Tecnológica del Uruguay, Instituto Tecnológico Regional Centro-Sur, Área de Matemáticas, Francisco Antonio Maciel s/n esq. Luis Morquio, 97000 Durazno, Uruguay
2. University of Navarra, Tecnun School of Engineering, Department of Mechanical Engineering and Materials, Manuel de Lardizábal 13, 20018 San Sebastián, Spain