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3. G. N. Salikhov, Cubature formulas for multidimensional spheres. (Tashkent: Fan„ 1985) p. 104.
4. T. Kh. Sharipov, Some questions of the theory of approximate integration., Ph.D. thesis, Diss. Candidate Phys.-Math. Sci. Tashkent, (1975).
5. Kh. M. Shadimetov, Lattice quadrature and cubature formulas in S.L.Sobolev spaces., Ph.D. thesis, Diss.Doctor of Phys.-Math. Sci. Tashkent (2002).