M.I. Álvarez-Fernández
[
Department of Mining Engineering, Mining Engineering School, University of Oviedo, Independencia 13, 33004 Asturias, Spain
]
A.E. Álvarez-Vigil
[
Department of Mathematics, Mining Engineering School, University of Oviedo, Independencia 13, 33004 Asturias, Spain
]
C. González-Nicieza
[
Department of Mining Engineering, Mining Engineering School, University of Oviedo, Independencia 13, 33004 Asturias, Spain
]
F. López Gayarre
[
Department of Construction and Manufacture Engineering, Engineering School of Gijon, Campus de Viesques, 33201 Asturias, Spain
]