Bogolubov,  Nikolai Nikolaevich  <br/><br/>
On some exactly solvable model problem with positive interaction / 
Nikolai Nikolaevich Bogolubov, A. S. Shumovsky. 
 - Kiev,  1972. 
 - 11 p. 
 - Academy of Sciences of Ukrainian SSR : Preprint .
<br/><br/><label>Subjects--Index Terms: </label>ფიზიკა თეორიული ფიზიკა 
<br/><br/><label>Universal Decimal Class. No.: </label>531(041)