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Authors: Assa, J.; Spassova, A.E.; Karamancheva, A.I.; Dimitrova, A.T.; Rangelov, C.N.; Danev, G.
Document Type: Research Article
Affiliations: Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 109, 1113, Sofia, Bulgaria
Publication date: October 1, 1998