1. L. C. Ho, in Observational Evidence for Black Holes in Universe, Ed. by S. K. Chakrabarti (Kluwer, Dordrecht, 1999), p. 157.
2. J. Kormendy and K. Gelhardt, in Proceedings of the 20th Texas Symposium on Relativistic Astrophysics, AIPConf.Proc. 586, 363 (2001).
3. A. M. Cherepashchuk, Phys. Usp. 46, 335 (2003).
4. A. Seth, M. Cappellari, Neumayer, et al., in Hunting for the Dark: The Hidden Side of Galaxy Formation, Ed. by V. P. Debattista and C. C. Popescu, AIP Conf. Proc. 1240, 227 (2010).
5. K. Gelhardt, R. Bender, G. Bower, et al., Astrophys. J. 539, L13 (2000).