Kharchenko, V. F.  <br/><br/>
Calculation of the binding energy and the wave  function of the Heł by the harmonic polynomial method :   [preprint] /  
V. F. Kharchenko and V. E. Kuzmichev. 
 - Kiev,   1970. 
<br/><br/><label>Universal Decimal Class. No.: </label>539.14