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@article{IVM_1984_11_a1, author = {R. G. Nigmatullin}, title = {Complexity of universal functions and lower bounds on complexity}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {10--20}, publisher = {mathdoc}, number = {11}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1984_11_a1/} }
R. G. Nigmatullin. Complexity of universal functions and lower bounds on complexity. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 11 (1984), pp. 10-20. http://geodesic.mathdoc.fr/item/IVM_1984_11_a1/