A. K. Gushchin, “A condition for the compactness of operators in a certain class and its application to the analysis of the solubility of non-local problems for elliptic equations”, Sb. Math., 193:5 (2002), 649–668
Dumanian V., “Near-Boundary Behavior of the Solution to the Dirichlet Problem for an Elliptic Second-Order Equation”, Dokl. Math., 66:2 (2002), 257–259
Gushchin, AK, “A condition for complete continuity of the operators arising in nonlocal problems for elliptic equations”, Doklady Mathematics, 62:1 (2000), 32
I. M. Petrushko, “Existence of boundary values for solutions of degenerate elliptic equations”, Sb. Math., 190:7 (1999), 973–1004
A. K. Gushchin, “Some properties of the solutions of the Dirichlet problem for a second-order elliptic equation”, Sb. Math., 189:7 (1998), 1009–1045
Gushchin A., “Inner Estimates of the Weak Solution of the Dirichlet Problem for a Second-Order Elliptic Equation”, Dokl. Akad. Nauk, 358:6 (1998), 731–733
Gushchin A., Mikhailov V., “On Unique Solvability of Non-Local Problems for Elliptic Equation”, Dokl. Akad. Nauk, 351:1 (1996), 7–8
A. K. Gushchin, V. P. Mikhailov, “On the continuity of the solutions of a class of non-local problems for an elliptic equation”, Sb. Math., 186:2 (1995), 197–219
A. K. Gushchin, V. P. Mikhailov, “On solvability of nonlocal problems for a second-order elliptic equation”, Russian Acad. Sci. Sb. Math., 81:1 (1995), 101–136
Gushchin A., Mikhailov V., “On Fredholmeness of Some Nonlocal Problems for an Elliptic-Equations of the 2nd-Order”, Dokl. Akad. Nauk, 333:3 (1993), 290–292
A. K. Gushchin, V. P. Mikhailov, “On the existence of boundary values of solutions of an elliptic equation”, Math. USSR-Sb., 73:1 (1992), 171–194