Multiband optical polarimetry of BL Lacertae objects with the Nordic Optical TelescopeL. Tommasi, E. Palazzi, E. Pian, V. Piirola, E. Poretti, F. Scaltriti, A. Sillanpää, L. Takalo and A. TrevesA&A, 376 1 (2001) 51-58DOI: https://doi.org/10.1051/0004-6361:20010940
