1. E. F. Taylor and J. A. Wheeler, Exploring Black Holes: Introduction to General Relativity (Addison Wesley, New York, 2000).
2. B. Abbot, R. Abbot, T. Abbot, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Afrough, B. Agarwal, M. Agathos, K. Agatsuma, et al., Phys. Rev. Lett. 118, 221101 (2017).
3. B. Coppi and M. Medvedev, MIT-LNS HEP Report 17/02, June 2017; Bull. Am. Phys. Soc. 62, BP11.00033 (2017). http://meetings.aps.org/link/BAPS.2017.DPP.BP11.33.
4. B. Coppi, Phys. Lett. A 382, 19 (2018);
5. Phys. Lett. A 382, 37 (2018).