SPIN ANALOGIES IN THE THEORY OF SUPERCONDUCTIVITY. THREE-SUBLATTICE MODEL OF Y1Ba2Cu3O7 V. I. Ozhogin et V. L. Safonov J. Phys. Colloques, 49 C8 (1988) C8-2241-C8-2242 DOI: 10.1051/jphyscol:198881004