Energy spectra of electron excitations in graphite and graphene and their dispersion making allowance for the electron spin and the time-reversal symmetry - V. O. Hubanov; A. P. Naumenko; M. M. Bilyi; I. S. Dotsenko; M. M. Sabov; M. S. Yakhnenko; L. A. Bulavin (Ukrainian Journal of Physics, 2020)