Butkevičiūtė, Eglė, Mantas Landauskas, and Liepa Bikulčienė. “Catastrophe Model in Nonlinear Dynamical Systems and Working Groups”. Lietuvos matematikos rinkinys 56, no. A (December 15, 2015): 12–17. Accessed May 1, 2024. https://www.journals.vu.lt/LMR/article/view/14920.