Ginzburg-Landau theory and effects of pressure on a two-band superconductor: application to MgB2 J. J. Betouras, V. A. Ivanov and F. M. Peeters Eur. Phys. J. B, 31 3 (2003) 349-354 Published online: 14 February 2003 DOI: 10.1140/epjb/e2003-00041-7