Lytvyn, O.M., O.O. Lytvyn, O.V. Tkachenko, and O.L. Gritsay. “Recovery of the Functions of Two Variables With Preservation of the Class Cr(R2) With the Help of Their Traces and the Traces of Their Derivatives up to a Fixed Order on the Given Curve”. Reports of the National Academy of Sciences of Ukraine, no. 2 (February 28, 2014): 50–55. Accessed July 11, 2026. https://nasu-periodicals.org.ua/index.php/dp/article/view/17437.