Adaptive optics imaging of low and intermediate redshift quasars I. Márquez, P. Petitjean, B. Théodore, M. Bremer, G. Monnet and J.-L. Beuzit A&A, 371 1 (2001) 97-106 Published online: 15 May 2001 DOI: 10.1051/0004-6361:20010359