1. Researcher, CITMAga, R/Constantino Candeira s/n, Santiago de Compostela 15782, Spain; Associate Professor, Dept. of Applied Mathematics, Universidade de Santiago de Compostela, Escola Politécnica Superior de Enxeñería, R/Benigno Ledo s/n, Lugo 27002, Spain. ORCID: .