Landau-Ginzburg method applied to finite fermion systems: Pairing in nucleiM. K. G. Kruse, H. G. Miller, A. R. Plastino, A. Plastino and S. FujitaEur. Phys. J. A, 25 3 (2005) 339-344DOI: https://doi.org/10.1140/epja/i2005-10133-0