1. V. A. Avakyan, “Asymptotic distribution of the spectrum of a linear sheaf perturbed by an analytic operator-valued function,” Funkts. Anal. Appl., 12, 129–131 (1978).
2. A. Garadzhaev, “On normal oscillations of an ideal compressible fluid in rotating elastic containers,” Sov. Math. Dokl., 27, 313–317 (1983).
3. A. Garadzhaev, “On a problem of oscillations of an ideal compressible fluid in an elastic container,” Dokl. AN SSSR, 286, No. 5, 1047–1049 (1986).
4. A. Garadzhaev, “Spectral theory of a problem of small oscillations of an ideal fluid in a rotating elastic vessel,” Differ. Uravn., 23, No. 1, 38–47 (1987).
5. Transl. Math. Monogr.;IC Gohberg,1969