J. R. Agachev, M. Yu. Pershagin Well-posedness of conditionally correct integro-differential equations in new pair of non-weighted Sobolev spaces Izv. Vyssh. Uchebn. Zaved. Mat., 2017, no. 8, 80–85
M. Yu. Pershagin Projection methods for solving a class of singular integrodifferential equations Izv. Vyssh. Uchebn. Zaved. Mat., 2008, no. 8, 35–42
M. Yu. Pershagin On a direct method for solving a singular integrodifferential equation on an interval of the real axis Izv. Vyssh. Uchebn. Zaved. Mat., 2005, no. 11, 44–46