SHVARTS, K. K.;  TUCHKEVICH, M. V.;  SHVARTS, K.K. <br/><br/>
Defects in insulating Crystals - Proceedings of the International Conference Riga, May 18-23, 1981 

 - Berlin;  New-York   Springer-Verlag  1981 
<br/><br/><label>Source: </label>C-90474 
<br/><br/><label>Universal Decimal Class. No.: </label>621.315.6620.19