Deep ISOPHOT far-infrared imaging of M 86 M. Stickel, J. N. Bregman, A. C. Fabian, D. A. White and D. M. Elmegreen A&A, 397 2 (2003) 503-515 Published online: 17 December 2002 DOI: 10.1051/0004-6361:20021496