Thermodynamic functions of electron gas on the semiconductor nanotube surface in a magnetic field A. M. Ermolaev, G. I. Rashba and M. A. Solyanik Eur. Phys. J. B, 73 3 (2010) 383-388 Published online: 31 December 2009 DOI: 10.1140/epjb/e2009-00443-5