@article {15557,
	title = {On the essential norms of singular integral operators with constant coeffcients and of the backward shift},
	journal = {Proceedings of the American Mathematical Society B},
	volume = {9},
	year = {2022},
	pages = {60-70},
	url = {https://doi.org/10.1090/bproc/118},
	author = {Karlovych, Oleksiy and Shargorodsky, Eugene}
}
