@article{TIMM_2023_29_4_a6,
     author = {V. P. Zastavnyi},
     title = {On extremal trigonometric polynomials},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {70--91},
     publisher = {mathdoc},
     volume = {29},
     number = {4},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2023_29_4_a6/}
}