Kondratiev, Yu. G., and T. Kuna. “Correlation Functionals for Gibbs Measures and Ruelle Bounds”. Methods of Functional Analysis and Topology 9, no. 1 (March 25, 2003): 9–58. Accessed February 4, 2026. https://zen.imath.kiev.ua/index.php/mfat/article/view/203.