\Refs

\ref\no 1
 \by              Nikolskii~N.K.
 \book            Operators, Functions, and Systems: An Easy Reading 
 \bookinfo        Vol.~1: Hardy, Hankel, and Toeplitz
 \publ            Amer. Math. Soc.
 \publaddr        Providence  
 \yr              2002
 \finalinfo       Math. Surveys and Monographs; vol.~92
\endref

\ref\no 2
 \by              Nikolskii~N.K.
 \book            Operators, Functions, and Systems: An Easy Reading
 \bookinfo        Vol.~2: Model Operators and Systems
 \publ            Amer. Math. Soc.
 \publaddr        Providence
 \yr              2002
 \finalinfo       Math. Surveys and Monographs; vol.~93
\endref

\ref\no 3
\by               Peller~V.V.
      \book       Hankel Operators and Their Applications
      \publaddr   Berlin
      \publ       Springer
      \yr         2003
      \bookinfo   Springer Monographs in Mathematics
\endref

\ref\no 4
\by               Ho~M.C.
\paper            On the rotational invariance for the essential spectrum of  $\lambda$-Toeplitz operators
\jour             J.~Math. Anal.  Appl.
\yr               2014 
\vol              413
\issue            2
\pages            557--565
\endref

\ref\no 5
\by               Mirotin~A.R.
\paper            On the essential spectrum of $\lambda$-Toeplitz operators over compact abelian groups
\jour             J.~Math. Anal.  Appl.
\yr               2015
\vol              424
\issue            2
\pages            1286--1295
\endref

\ref\no 6
\by               Mirotin~A.R. and Kuzmenkova~E.Yu.
\paper            $\mu$-Hankel operators on Hilbert spaces
\jour             Opuscula Math.
\yr               2021
\vol              41 
\issue            6
\pages            881--899
\endref

\ref\no 7
\by               Martinez-Avenda\~{n}o~R.A. and   Rosenthal~P.
      \book       An Introduction to Operators on the Hardy--Hilbert Space
      \publaddr   New York
      \publ       Springer
      \yr         2007
\endref

\ref\no 8
\by                Akhiezer~N.I. and  Glazman~I.M.
      \book        Theory of Linear Operators in Hilbert Space
       \publ       Dover
      \publaddr    New York
      \yr          1993 
      \endref

\ref\no 9
\by               Mirotin~A.R. and Kovalyova~I.S.
\paper            The Markov--Stieltjes Transform on Hardy and Lebesgue Spaces 
\jour             Integral Transforms and Special Functions
\yr               2016
\vol              27
\issue            12
\pages            995--1007
\finalinfo        Corrigendum to our paper ``The Markov--Stieltjes transform on Hardy and Lebesgue spaces,''
                  Integral Transforms and Special Functions, 2017, vol.~28, no.~5, pp.~421--422 
\endref

\ref\no 10
\by               Mirotin~A.R. and Kovalyova~I.S.
\paper            Generalized Markov--Stieltjes operator on Hardy and Lebesgue spaces
\jour             Tr. Inst. Mat.
\yr               2017
\vol              25 
\issue            1
\pages            39--50
\endref

\ref\no 11
\by               Weidmann~J.
      \book       Linear Operators in Hilbert Spaces
      \publaddr   New York
      \publ       Springer
      \yr         1980
\endref

\ref\no 12
\by            Zhu~K.
 \book         Operator Theory in Function Spaces
 \bookinfo     Second Edition 
 \publ         Amer. Math. Soc.
 \publaddr     Providence  
\yr            2007
 \finalinfo    Math. Surveys and Monographs; vol.~138
\endref

\ref\no 13
\by              Prudnikov~A.P., Brychkov~Yu.A., and Marichev~O.I.
      \book      Integrals and Series: Elementary Functions
      \publ      Gordon and Breach
      \publaddr  New York
      \yr        1986
\endrefs

\endRefs