1. Hulse, R.A., Taylor, J.H.: Astrophys. J. 195, L51 (1975)
2. B. P. Abbott et al. [LIGO Scientific and Virgo Collaborations], Phys. Rev. Lett. 116(6), 061102 (2016)
3. B. P. Abbott et al. [LIGO Scientific and Virgo Collaborations], Phys. Rev. Lett. 116(24), 241103 (2016)
4. B. P. Abbott et al. [LIGO Scientific and Virgo Collaborations], Phys. Rev. Lett. 119(14), 141101 (2017)
5. B. P. Abbott et al. [LIGO Scientific and Virgo Collaborations], Phys. Rev. Lett. 119(16), 161101 (2017)