O. Lytvyn, O. Lytvyn, O. Tkachenko, and O. 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 ”, Dopov. Nac. akad. nauk Ukr., no. 2, pp. 50–55, Mar. 2025.