@article{UFA_2023_15_1_a0,
     author = {G. A. Akishev},
     title = {On estimates for orders of best $M$-term approximations},
     journal = {Ufa mathematical journal},
     pages = {1--20},
     year = {2023},
     volume = {15},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2023_15_1_a0/}
}