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by Mahnke, Reinhard; Kaupuzs, Jevgenijs; Lubashevsky, Ihor
by Ihor Lubashevsky; Natalie Plavinska
by Lubashevsky, Ihor
by Skiadas, Christos H.; Lubashevsky, Ihor
by Ihor Lubashevsky
by Reinhard Mahnke (Rostock University, Germany); Jevgenijs Kaupuzs (University of Latvia, Riga); Ihor Lubashevsky (Russian Academy of Sciences, Moscow)