Vivian López Batista (Researcher) E-mail: vivian@usal.es Telephone: +34 923 294400 ()

Ángel Luis Sánchez Lázaro (Researcher) E-mail: alsl@usal.es Telephone: +34 923 294400 ()

Mª Dolores Muñoz Vicente (Researcher) E-mail: mariado@usal.es Telephone: +34 923 294400 (3092 )

Luis Alonso Romero (Researcher) http://avellano.usal.es/~lalonso E-mail: lalonso@usal.es Telephone: +34 923 294450 (1513)