1. T. Ya. Azizov, ?Nondegeneracy criteria for the closed linear hull of the root vectors of ?-dissipative completely continuous operators in a Pontragin space ??,? in: Compendium of Graduate-student's Papers. Mathematical Faculty of Voronezh University, No. 1 (1971), pp. 1?5.
2. T. Ya. Azizov, ?On spectra of certain classes of operators in a Hilbert space,? Mat. Zametki,9, No. 3, 303?310 (1971).
3. T. Ya. Azizov, ?On the decomposition of a normed space into a direct or approximate sum of special subspaces,? Tr. NII Mat. Voronezh. Univ., No. 3, 1?3 (1971).
4. T. Ya. Azizov, ?Invariant subspaces and criteria for completeness of systems of root vectors of ?-dissipative operators in a Pontryagin space ??,? Dokl. Akad. Nauk SSSR,200, No. 5, 1015?1017 (1971).
5. T. Ya. Azizov, ?On invariant subspaces of a family of commuting operators in a ?? space,? Funkts. Anal. Prilozhen.,6, No. 3, 59?60 (1972).