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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY  (2010)

Variability and stability in blazar jets on time-scales of years: optical polarization monitoring of OJ 287 in 2005-2009

Villforth, C; Nilsson, K; Heidt J.; Pursimo, T; Berdyugin A.; Lindfors, E; Pasanen M.; Winiarski, M; Drozdz, M; Ogloza, W; Kurpinska-Winiarska, M.; Siwak, M.; Koziel-Wierzbowska, D.; Porowski, C.; Kuzmicz, A.; et. al.