Measuring the Spin of the Primary Black Hole in OJ287 - Valtonen, M.; Mikkola, S.; Merritt, D.; Gopakumar, A.; Lehto, H.; Hyvönen, T.; Rampadarath, Hayden; Saunders, R.; Basta, M.; Hudec, R. (The American Astronomical Society, 2010)