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by Olena Bulatsyk (National Ukrainian Academy of Sciences, Lviv, Ukraine); Boris Z. Katsenelenbaum (Nahariya, Israel); Yury P. Topolyuk (Department of Numerical Methods in Mathematical Physics, National Ukrainian Academy of Sciences, Lviv, Ukraine); et al.
by Boas, Mary L.
by Neu, John C.
by Unknown
by Express Ltd. Co.; Global
by Mary L. Boas (DePaul Univ.)
by Groetsch, Charles W.