Sudou, H.; Iguchi, S.; Murata, Y.; Taniguchi, Y. Orbital Motion in the Radio Galaxy 3C 66B: Evidence for a Supermassive Black Hole Binary. Science. 2003, 300 (5623): 1263–1265. PMID 12764190. doi:10.1126/science.1082817. 引文使用過時參數coauthors (幫助); 使用|accessdate=需要含有|url= (幫助)
Jenet, F.; Lommen, A.; Larson, S. L.; Wen, L. Constraining the Properties of Supermassive Black Hole Systems Using Pulsar Timing: Application to 3C 66B. The Astrophysical Journal. 2004, 606 (2): 799–803. doi:10.1086/383020. 引文使用過時參數coauthors (幫助); 使用|accessdate=需要含有|url= (幫助)
Perlin, Eric S.; Padgett; Georganopoulos; Sparks; Biretta; et al. Optical Polarimetry of the Jets of Nearby Radio Galaxies. I. The Data. The Astrophysical Journal. 2006, 651 (2): 735–748. Bibcode:2006ApJ...651..735P. doi:10.1086/506587. 引文使用過時參數coauthors (幫助)