Voir la notice de l'article provenant de la source Math-Net.Ru
[1] Zhizhiashvili L. V., UMN, 28:2 (1973), 65–119 | MR
[2] Alimov Sh. A., Ilin V. A., Differents. uravneniya, 7:4 (1971), 670–710 | MR | Zbl
[3] Arutyunyan F. G., Dokl. AN ArmSSR, 64:2 (1977), 72–76 | MR | Zbl
[4] Arutyunyan F. G., Matem. sb., 126:2 (1985), 267–285 | MR | Zbl
[5] Dyachenko M. I., Izv. RAN. Ser. matem., 59:2 (1995), 128–142 | MR
[6] Ulyanov P. L., Dokl. RAN, 333:2 (1993), 157–160 | MR | Zbl
[7] Potapov M. K., Tr. MIAN, 117, Nauka, M., 1972, 256–291 | MR | Zbl
[8] Yudin A. A., Yudin V. A., Matem. zametki, 22:3 (1977), 381–394 | MR | Zbl
[9] Bari N. K., Stechkin S. B., Tr. MMO, 5, URSS, M., 1956, 485–522 | MR