Shi, Weizhao; Liu, Xiang; Song, Huagang (2007). «A new model for the periodic outbursts of the BL Lac object OJ287». Astrophysics and Space Science310 (1–2): 59-63. Bibcode:2007Ap&SS.310...59S. doi:10.1007/s10509-007-9413-z.
Shi, Weizhao; Liu, Xiang; Song, Huagang (2007). «A new model for the periodic outbursts of the BL Lac object OJ287». Astrophysics and Space Science310 (1–2): 59-63. Bibcode:2007Ap&SS.310...59S. doi:10.1007/s10509-007-9413-z.