@article{Bushev _2019 author = {Dmitriy N. Bushev }, title = {Isometry of the Functional Spaces with Different Number of Variables and Some its Applications in the Theory of Approximation of Functions}, journal = {Journal of Automation and Information Sciences}, issn = {1064-2315}, year = {2019}, volume = {51}, number = {1}, pages = {70--77} }