Structural properties of disk galaxies - I. The intrinsic equatorial ellipticity of bulges J. Méndez-Abreu, J. A. L. Aguerri, E. M. Corsini and E. Simonneau A&A, 487 2 (2008) 555-556 Published online: 24 June 2008 DOI: 10.1051/0004-6361:20078089e