I. V. Boikov, Yu. F. Zakharova, “Priblizhennye metody resheniya singulyarnykh i gipersingulyarnykh integrodifferentsialnykh uravnenii”, Izvestiya vysshikh uchebnykh zavedenii. Povolzhskii region. Fiziko-matematicheskie nauki, 2012, no. 3, 99–113
I. V. Boikov, I. I. Zhechev, “Approximate solution of singular integrodifferential equations on closed contours of integration”, J Math Sci, 41:3 (1988), 1003