1. F. Ambrosino, A. Papitto, L. Stella, et al., Nature Astronomy 1, 854 (2017).
2. G. Beskin, V. de-Bur, S. Karpov, et al., SPIE Conf. Proc. 7021, 702120 (2008).
3. G. Beskin, S. Karpov, V. Plokhotnichenko, et al., Publ. Astron. Soc. Australia 34, e010 (2017a).
4. G. Beskin, S. Karpov, V. Plokhotnichenko, et al., ASP Conf. Ser. 510, 303 (2017c).
5. G. Beskin, S. Karpov, V. Plokhotnichenko, et al., in Proc. Int. Conf. on The Multi-Messenger Astronomy: Gamma-Ray Bursts, Search for Electromagnetic Counterparts to Neutrino Events and Gravitational Waves, Nizhnij Arkhyz, Terskol, Russia,
2018, Ed. by V. V. Vlasyuk, et al. (SNEG, Pyatigorsk, 2019a), pp. 37–43.