7498 Konstantin Astapov, Dmitry Kirpichnikov, Petr Satunin / Photon splitting constraint on Lorentz invariance violation from Crab Nebula spectrum // J. Cosmol. Astropart. Phys. (2019), is.4, DOI:10.1088/1475-7516/2019/04/054

7813 Petr Satunin / New constraints on Lorentz Invariance violation from Crab Nebula spectrum beyond 100 TeV // Eur. Phys. J. C (2019) vol.79, is.12, DOI:10.1140/epjc/s10052-019-7520-y