Filling the infrared gap: ISO observations of 1 Jy BL Lacertae objects P. Padovani, P. Giommi, P. Ábrahám, S. Csizmadia and A. Moór A&A, 456 1 (2006) 131-139 Published online: 23 August 2006 DOI: 10.1051/0004-6361:20065382