1. Group of NonLinear Physics, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
2. Galician Center for Mathematical Research and Technology (CITMAga), 15782 Santiago de Compostela, Spain
3. CESGA (Supercomputing Center of Galicia), Avda. de Vigo s/n, 15705 Santiago de Compostela, Spain