@article{MZM_2017_102_1_a5,
     author = {R. A. Lasuriya},
     title = {$\varphi${-Strong} {Approximation} of {Functions} by {Trigonometric} {Polynomials}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {52--63},
     publisher = {mathdoc},
     volume = {102},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_102_1_a5/}
}