Hankel and Toeplitz operators in hardy spaces

In this paper one considers some general theorems of the theory of Hankel and Toeplitz operators in spaces of analytic functions. Under natural restrictions on the spaces $X$, it is shown that the symbols of the Toeplitz operators, acting in $X$, are bounded. One describes completely the symbols of the Hankel and Toeplitz operators, acting from $H^p$ into $\overline H^q$ (into $H^q$) for $0<p$, $q<\infty$.