Enchev, Venelin
Markova, Nadezhda
Marinov, Marin
Stoyanov, Neyko
Rogojerov, Marin
Ugrinov, Angel
Wawer, Iwona
Pisklak, Dariusz Maciej
Funding for this research was provided by:
Bulgarian National Science Fund (Grant DO 02-52/2008)
NSF-CRIF (CHE-0946990)