Skrypnik, W. I. “Sine-Gordon Transformations in Nonequilibrium Systems of Brownian Particles”.
Ukrains’kyi Matematychnyi Zhurnal 49, no. 10 (October 25, 1997): 1404–1421. Accessed April 7, 2025.
https://umj.imath.kiev.ua/index.php/umj/article/view/5138.