1. Prössdorf, S., Einige Klassen singularer Gleichungen, Berlin: Akademie-Verlag, 1977. Translated under the title Nekotorye klassy singulyarnykh uravnenii, Moscow: Mir, 1979.
2. Shishkin, G.A., Lineinye integro-differentsial’nye uravneniya (Linear Integro-Differential Equations), Ulan-Ude, 2007.
3. Engibaryan, N.B. and Khachatryan, A.Kh., An Integro-Differential Equation for Nonlocal Wave Interaction, Mat. Sb., 2007, vol. 198, no. 6, pp. 89–106.
4. Akhiezer, N.I., Klassicheskaya problema momentov (The Classical Moment Problem and Some Related Topics in Analysis), Moscow: Gosudarstv. Izdat. Fiz.-Mat. Lit., 1961.
5. Krein, M.G. and Nudel’man, A.A., Problema momentov Markova i ekstremal’nye zadachi (The Markov Moment Problems, and Extremal Problems), Moscow: Nauka, 1973.