Post Gaussian effective potential in the Ginzburg Landau theory of superconductivity C. K. Kim, A. Rakhimov and Jae Hyung Yee Eur. Phys. J. B, 39 3 (2004) 301-308 Published online: 12 July 2004 DOI: 10.1140/epjb/e2004-00195-8