An optical time-delay for the lensed BAL quasar HE 2149-2745 I. Burud, F. Courbin, P. Magain, C. Lidman, D. Hutsemékers, J.-P. Kneib, J. Hjorth, J. Brewer, E. Pompei, L. Germany et al. (4 more) A&A, 383 1 (2002) 71-81 Published online: 15 February 2002 DOI: 10.1051/0004-6361:20011731