Klimentov S. B. 
        Representations of the “second kind” for the hardy classes of solutions to the Beltrami equation
        We give examples of the absence of representations  of the “second kind” for a Beltrami equation. Some sufficient conditions are  proposed for the existence of these representations. We specify the regularity  “up to the boundary” of a quasiconformal homeomorphism of the unit circle onto  itself in the case of a regular complex characteristic.