@article{IM2_2020_84_4_a2,
     author = {A. B. Aleksandrov and V. V. Peller},
     title = {Functions of perturbed pairs of non-commuting contractions},
     journal = {Izvestiya. Mathematics },
     pages = {659--682},
     publisher = {mathdoc},
     volume = {84},
     number = {4},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2020_84_4_a2/}
}