Gugushvili, E.I. <br/><br/>
THE RIEMANN METHOD IN THE INVERSE PROBLEM OF SCATTERING THEORY. [PART] I. / 
E I Gugushvili,  Yu L Mentkovskii. 
 - kiev :   Academy of Sciences of the Ukrainian  SSR.,  1969. 
<br/><br/><label>Universal Decimal Class. No.: </label>539.171