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[1] A. I. Volpert, “Ob indekse i normalnoi razreshimosti granichnykh zadach dlya ellipticheskikh sistem differentsialnykh uravnenii na ploskosti”, Tr. MMO, 10, GIFML, M., 1961, 41–87 | MR | Zbl
[2] Russian Math. Surveys, 20:5 (1965), 1–121 | DOI | MR | Zbl
[3] L. A. Bagirov, “Elliptic equations in unbounded domains”, Math. USSR-Sb., 15:1 (1971), 121–140 | DOI | MR | Zbl
[4] G. A. Karapetyan, A. A. Darbinyan, Vestnik RAU, 2006, Godichnaya nauchnaya konferentsiya, 20–24
[5] Karapetyan G.A., Darbinyan A.A., “Ob indekse poluellipticheskogo operatora v $\mathrm{Irn}$”, Izv. NAN Armenii. Matematika, 42:5 (2007), 33–50 | MR | Zbl
[6] S. M. Nikolskii, “Variatsionnaya zadacha”, Matem. sb., 62(104):1 (1963), 53–75 | MR | Zbl
[7] O. V. Besov, V. P. Ilin, S.M. Nikolskii, Integralnye predstavleniya funktsii i teoremy vlozheniya, Nauka, M., 1977
[8] Z. Presdorf, Nekotorye klassy singulyarnykh uravnennyi, Mir, M., 1979
[9] R.T. Seeley, “The index of elliptic systems of singular integral operators”, Journal of Math. Analysis and App., 7 (1963), 289–309 | MR | Zbl
[10] I. Ts. Gokhberg, M. G. Krein, “Osnovnye polozheniya o defektnykh chislakh, kornevykh chislakh i indeksakh lineinykh operatorov”, UMN, 12:2(74) (1957), 43–118 | MR | Zbl