Chuiko, S.M., and O.V. Nesmelov. “The Newton—Kantorovich Method in the Theory of Autonomous Noetherian Boundary-Value Problems in the Case of Parametric Resonance”. Reports of the National Academy of Sciences of Ukraine, no. 12 (April 24, 2024): 3–12. Accessed November 2, 2024. https://nasu-periodicals.org.ua/index.php/dp/article/view/2517.