E-mail: tsitver@gmail.com 
 
PACS-Code: 98.80.-k; 98.80.Bp; 98.80.Jk; 95.30.Sf; 95.36.+x; 95.30.-k; 95.30.Tg; 04.70.Dy; 47.75+f; 05.70.Ln;  
05.70.-a; 04.20.-q; 95.30.Lz 
 
AMS-Code(MSC): 80A05; 80A10; 83C15; 83C40; 83F05; 85A30; 76E20