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@article{DAN_1957_116_6_a4, author = {A. A. Markov}, title = {On the inversion complexity of function systems}, journal = {Doklady Akademii Nauk}, pages = {917--919}, publisher = {mathdoc}, volume = {116}, number = {6}, year = {1957}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1957_116_6_a4/} }
A. A. Markov. On the inversion complexity of function systems. Doklady Akademii Nauk, Tome 116 (1957) no. 6, pp. 917-919. http://geodesic.mathdoc.fr/item/DAN_1957_116_6_a4/