1. Information-based numerical practice;Babuška, I.;J. Complexity,1987
2. Approximate computation of multiple integrals;Bahvalov, N. S.;Vestnik Moskov. Univ. Ser. Mat. Meh. Astr. Fiz. Him.,1959
3. \bysame, On optimal bounds for the convergence of quadrature formulas and Monte-Carlo type integration methods for classes of functions, Numerical Methods for the Solution of Differential and Integral Equations and Quadrature Formulas, Nauka, Moscow, 1964, pp. 5-63. (Russian)
4. \bysame, On the optimality of linear methods for operator approximation in convex classes of functions, U.S.S.R Comput. Math., and Math. Phys. 11 (1971), 244-249. (Russian)
5. On a theory of computation and complexity over the real numbers: NP-completeness, recursive functions and universal machines;Blum, Lenore;Bull. Amer. Math. Soc. (N.S.),1989