M. Dessauges-Zavadsky (1), J. X. Prochaska (2), S. D'Odorico (3), F. Calura (4), F. Matteucci (4 and 5) ((1) Observatoire de Geneve, Switzerland; (2) UCO/Lick Observatory, University of California at Santa Cruz, USA; (3) European Southern Observatory, Germany; (4) Dipartimento di Astronomia-Universita di Trieste, Italy; (5) Osservatorio Astronomico di Trieste, Italy)
