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by Dimov, Ivan; Farago, István; Havasi, Ágnes; et al.
by Sabelfeld, Karl K.; Dimov, Ivan
by Ivan Dimov; Stefka Fidanova
by Mihail Nedjalkov; Ivan Dimov; Siegfried Selberherr
by Dimov, Ivan; Fidanova, Stefka; Lirkov, Ivan
by Dimov, Ivan; Faragó, István; Vulkov, Lubin