Rashba, EmmanuelSheka, V2016-11-212015E. I. Rashba and V. I. Sheka. 2015. Symmetry of Energy Bands in Crystals of Wurtzite Type II. Symmetry of Bands with Spin-Orbit Interaction Included. New. J. Phys. 17 050202. Originally published in Fiz. Tverd. Tela: Collected Papers 2: 62–76, 1959.1367-2630http://nrs.harvard.edu/urn-3:HUL.InstRepos:29426010Double-valued representations of the space group C4 6v (wurtzite lattice) have been constructed. A variant of perturbation theory is presented, allowing the investigation of the dispersion law in the vicinity of symmetry elements taking into consideration the spin-orbit interaction. The formulae obtained here differ from those available in the literature and lead to a qualitatively different dispersion law for a number of points. A group theoretical analysis of the structure of energy bands in a wurtzite type lattice was carried out taking the spin-orbit interaction into consideration. The possibility of energy surfaces E(k), where (in a proper approximation) the extremum is reached along an entire curve rather than in isolated points of k space, is demonstrated.en-USJournal Article2015-12-18E. I. Rashba and V. I. Sheka2016-11-21