Determination of limits on disc masses around six pulsars at 15 and 90 μm L. Koch-Miramond, M. Haas, E. Pantin, Ph. Podsiadlowski, T. Naylor and M. Sauvage A&A, 387 1 (2002) 233-239 Published online: 15 May 2002 DOI: 10.1051/0004-6361:20020386