@article{10_4153_S0008439522000145,
     author = {Yattselev, Maxim L.},
     title = {On smooth perturbations of {Chebysh\"ev} polynomials and $ \bar {\partial } ${-Riemann{\textendash}Hilbert} method},
     journal = {Canadian mathematical bulletin},
     pages = {142--155},
     year = {2023},
     volume = {66},
     number = {1},
     doi = {10.4153/S0008439522000145},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439522000145/}
}