Prikarpatsky A. K., and Fil В. M. “Category of Topological Jet-Variables in the Theory of Nonlinear Infinite-Dimensional Dynamic Systems”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 9 (October 7, 1992): 1242-1256. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8177.