SkrypnikW. I. “Long-Range Order in Linear Ferromagnetic Oscillator Systems. Strong Pair Quadratic N-N Potential”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 6 (June 25, 2004): 810–817. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3800.