TY - BOOK AU - Lüders,Gerhart AU - Usadel,K.-D. TI - The method of the correlation function in superconductivity theory T2 - Springer tracts in modern physics, SN - 0387052518 U1 - 539/.08 PY - 1971///] CY - [Berlin PB - Springer-Verlag KW - Superconductivity KW - Approximation theory KW - Transport theory ER -