Artūras Štikonas, “INVESTIGATION OF CHARACTERISTIC CURVE FOR STURM–LIOUVILLE PROBLEM WITH NONLOCAL BOUNDARY CONDITIONS ON TORUS”, Mathematical Modelling and Analysis, 16:1 (2011), 1
O. M. Belotserkovskii, S. V. Emel'yanov, I. V. Gaishun, N. A. Izobov, M. P. Kirpichnikov, S. K. Korovin, A. B. Kurzhanskii, I. S. Lomov, V. P. Maslov, E. I. Moiseev, S. M. Nikol'skii, Yu. S. Osipov, V. A. Sadovnichii, T. K. Shemyakina, I. A. Shishmarev, Yu. I. Zhuravlev, “Vladimir Aleksandrovich Il'in a tribute in honor of his eightieth birthday”, Diff Equat, 44:5 (2008), 597
Г. В. Радзиевский, “Прямые и обратные теоремы о приближении по корневым функциям регулярной краевой задачи”, Матем. сб., 197:7 (2006), 87–136 ; G. V. Radzievskii, “Direct and inverse theorems on approximation by root functions of a regular boundary-value problem”, Sb. Math., 197:7 (2006), 1037–1083