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[1] Vazov V., Asimptoticheskie razlozheniya reshenii obyknovennykh differentsialnykh uravnenii, Mir, M., 1968, 464 pp.
[2] Wasow W., Linear turning point theory, Springer-Verlag, New York Ins., 1985, 243 pp. | MR | Zbl
[3] Lomov S. A., Vvedenie v obschuyu teoriyu singulyarnykh vozmuschenii, Nauka, M., 1981, 398 pp. | MR
[4] Olver F., “Asimptotika i spetsialnye funktsii”, Trans. Amer. Math. Soc., 226 (1977), 227–241 | DOI | MR | Zbl
[5] Bobochko V. M., Perestyuk M. O., Asimptotichne integruvannya rivnyannya Liuvillya z tochkami zvorotu, Nauk. dumka, Kiïv, 2002, 310 pp.
[6] Bobochko V. N., “Vnutrennyaya tochka povorota v teorii singulyarnykh vozmuschenii”, Ukr. matem. zhurn., 48:7 (1996), 876–890 | MR | Zbl
[7] Bobochko V. N., “Asimptoticheskoe integrirovanie sistemy differentsialnykh uravnenii s tochkoi povorota”, Differents. uravneniya, 27:9 (1991), 1505–1515 | MR
[8] Bobochko V. N., “Sistema differentsialnykh uravnenii s silnoi tochkoi povorota”, Ukr. matem. zhurn., 49:11 (1997), 1543–1547 | MR | Zbl
[9] Bobochko V. N., “Sistema differentsialnykh uravnenii s tochkoi povorota v sluchae nediagonaliziruemogo predelnogo operatora”, Differents. uravneniya, 34:10 (1998), 1304–1312 | MR | Zbl
[10] Dorodnitsyn A. A., “Asimptoticheskie zakony raspredeleniya sobstvennykh znachenii dlya nekotorykh osobykh vidov differentsialnykh uravnenii vtorogo poryadka”, UMN, 7:6 (1952), 3–96