M. Dessauges-Zavadsky (1), F. Calura (2), J. X. Prochaska (3), S.
  D'Odorico (4), F. Matteucci (5,2) ((1) Geneva Observatory, Switzerland, (2)
  INAF, Trieste, Italy, (3) UCO/Lick Observatory, USA, (4) ESO, Germany, (5)
  Dipartimento di Astronomia, Trieste, Italy)