W. I. Skrypnik, “On polymer expansions for generalized Gibbs lattice systems of oscillators with ternary interaction”, Ukr. Mat. Zhurn., vol. 65, no. 5, pp. 689–697, May 2013, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2452