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by Martynyuk, A. A.; Martynyuk-chernienko, Y. A.
by Devaney, Robert L.
by Melin, Patricia; Castillo, Oscar
by Singh, Tarunraj
by Swishchuk, Anatoliy; Islam, Shafiqul
by Kulenovic, Mustafa R. S.; Merino, Orlando
by Karl-Heinz Becker , Michael Dörfler , Translated by I. Stewart
by Lynch, Stephen
by Barron, Matthew
by Pizzi, Rita Maria Rosa; Musumeci, Marialessia