@article{IIGUM_2020_33_a0,
     author = {V. I. Zorkaltsev and E. Gubiy},
     title = {Chebyshev approximations by least squares method},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {3--19},
     publisher = {mathdoc},
     volume = {33},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2020_33_a0/}
}