The stellar content of low redshift BL Lacertae host galaxies from multicolour imaging T. Hyvönen, J. K. Kotilainen, R. Falomo, E. Örndahl and T. Pursimo A&A, 476 2 (2007) 723-734 Published online: 09 October 2007 DOI: 10.1051/0004-6361:20078202