BAR`YAKHTAR, V. G., ZAROCHENTSEV, E. V., & Yu, Y. A. (1991). Self-consistency equations for crystallinesuperconductor in the generalized U-V transformation technique. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 17(9), 1090–1093. вилучено із https://fnt.ilt.kharkiv.ua/index.php/fnt/article/view/f17-1090e