1. D. Alberg, E. Nielson, and L. Walsh, Theory of Splines and Its Application [Russian translation], Mir, Moscow (1972).
2. S. A. Ambartsumyan, Theory of Anisotropic Shells [in Russian], Fizmatgiz, Moscow (1961).
3. R. Bellman and R. Kalaba, Quasi-linearization and Nonlinear Boundary-Value Problems [Russian translation], Mir, Moscow (1968).
4. V. A. Vasilenko, Spline Functions: Theory, Algorithms, Programs [in Russian], Nauka, Novosibirsk (1983).
5. V. Z. Vlasov, General Theory of Shells and Its Application in Engineering [in Russian], Gostekhizdat, Moscow-Leningrad (1949).