Voir la notice de l'article provenant de la source Math-Net.Ru
[1] B.M. Levitan, I.G. Sargsyan, Operatory Shturma–Liuvillya i Diraka, Nauka, M., 1988 | MR
[2] A.G. Kostyuchenko, I.G. Sargsyan, Raspredelenie sobstvennykh znachenii, Nauka, M., 1979 | MR
[3] M.V. Fedoryuk, Obyknovennye differentsialnye uravneniya, Nauka, M., 1985 | MR
[4] A. G. Kazaryan, A. O. Oganisyan, T. N. Arutyunyan, G. A. Karapetyan, Obyknovennye differentsialnye uravneniya, Er., 2002 (na Armyanskom)
[5] Dzh. Sansone, Obyknovennye differentsialnye uravneniya, v. 1, IL, M., 1953 | MR
[6] V.A. Yakubovich, B.M. Starzhinskii, Lineinye differentsialnye uravneniya s periodicheskimi koeffitsientami, Nauka, M., 1972 | MR
[7] H. Langer, B. Textopus, “$L$-resolvent matrices of symmetric linear relations with equal defect numbers; applications to canonical differential relations”, Int. Equat. and Oper. Theory, 5 (1982), 208–243 | DOI | MR | Zbl
[8] E.V. Foliadova, “Ostsillyatsionnaya teorema dlya sistemy Diraka s parametrom v kraevom uslovii. Funktsionalnyi analiz. Spektralnaya teoriya”, Mezhvuzovskii sbornik nauchnykh trudov. Ulyanovsk, 1984, 111–122 | Zbl