The ATESP radio survey - IV. Optical identifications and spectroscopy in the EIS-A region I. Prandoni, L. Gregorini, P. Parma, H. R. de Ruiter, G. Vettolani, A. Zanichelli, M. H. Wieringa and R. D. Ekers A&A, 369 3 (2001) 787-796 Published online: 15 April 2001 DOI: 10.1051/0004-6361:20010170