Bondarenko, N. P. <br/><br/>
Exact conformally-plane solution of the Einstein equations for the non-static axial field symmetry :   [Preprint] /  
N. P. Bondarenko, P. K. Kobushkin. 
 - Kiev,   1969. 
<br/><br/><label>Universal Decimal Class. No.: </label>530.12