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First Author:
 
José Atilano Pena López
University of A Coruña
atilano@udc.es
 
A Coruña, 15071, Spain
 
34981167000, ext.- 2422(Phone)
34981167000, ext.- 2422(Fax)

Second Author:

José Manuel Sánchez Santos
University of A Coruña
santos67@udc.es
 
A Coruña, 170071, Spain