1. Department of Mining and Civil Engineering, Universidad Politécnica de Cartagena, 30203 Cartagena, Spain
2. Department of Geography, History and Humanities, Universidad de Almería, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
3. Civil Engineering Department, Pontificia Universidad Javeriana, Carrera 7a No. 40-62, Bogotá 110231, Colombia