The Bogolubov generating functional method in statistical physics and ”collective” variables transform within the grand canonical ensemble. Neliniini Kolyvannya, [S. l.], v. 10, n. 1, p. 37–50, 2007. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/419. Acesso em: 21 jan. 2026.