MELNIKOV, N.; ROMANENKO, Y. Optimal Gaussian approximation in the Ising model. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), [S. l.], v. 13, n. 33, p. 452–464, 2012. Disponível em: https://en.num-meth.ru/index.php/journal/article/view/542. Acesso em: 14 dec. 2025.