1. S. A. Chaplygin and V. V. Golubev, Theory of Leading-Edge and Trailing-Edge Flaps (Trudy TsAGI, Moscow, 1935) [in Russian].
2. V. V. Golubev, Research into the Theory of Leading-Edge, Trailing-Edge, and Plain Flaps (Gostekhizdat, Moscow, 1957) [in Russian].
3. G. G. Tumashev and M. T. Nuzhin, Inverse Boundary Value Problems and Applications (Kazan. Gos. Univ., Kazan, 1965) [in Russian].
4. N. B. Il’inskii and A. V. Potashev, “Construction of an Airfoil with a Trailing-Edge Flap Simulated by a Point Vortex,” Izv. Ross. Akad. Nauk, Mekh. Zhidk. Gaza, No. 1, 3–9 (1992).
5. A. M. Elizarov, “Some Extremal Problems in Airfoil Theory,” Izv. Vyssh. Uchebn. Zaved., Mat., No. 10, 71–74 (1988).