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2. On extensions of semimodules. (Russian) Soobshch. Akad. Nauk Gruzin. SSR 84 (1976), No. 3, 545-548.

3. Extensions of semimodules by monoids and their cohomological characteristic. (Russian) Soobshch. Akad. Nauk Gruzin. SSR 86 (1977), No.1, 21-24.

4. Cohomology of monoids with coefficients in semimodules. (Russian) Soobshch. Akad. Nauk Gruzin. SSR 86 (1977), No.3, 545-548.

5. Schreier normal extensions of semimodules. (Russian) Trudy Tbiliss. Mat. Inst. Razmadze 62 (1979), 76-90.

6. On derived functors of semimodule-valued functors. (Russian) Trudy Tbiliss. Mat. Inst. Razmadze 83 (1986), 60-75.

7. On cohomology monoids. (Russian) Trudy Tbiliss. Mat. Inst. Razmadze 91 (1988), 36-43.

8. Crossed semimodules and Schreier internal categories in the category of monoids. Georgian Math. J. 5 (1998), No. 6, 575-581.

9. Homology and cohomology monoids of presimplicial semimodules. Bull. Georgian Acad. Sci. 162 (2000), No. 1, 9-12.

10. Chain complexes of cancellative semimodules. Bull. Georgian Acad. Sci. 162 (2000), No. 2, 206-208.

11. Extension of semimodules and the Takahashi functor Ext_L(C,A). Homology Homotopy Appl. 5 (2003), No. 1, 387-406.