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by Grant, Randy R.; Leadley, John C.; Zygmont, Zenon X.
by Rodriguez, Placido; Kzsenne, Stefan; Koning, Ruud
by Leeds, Eva Marikova; Leeds, Michael
by Butenko, Sergiy; Gil-Lafuente, Jaime; Pardalos, Panos M.
by Leeds; Michael
by Andreff, Wladimir
by Rodri´guez, Pla´cido; Humphreys, Brad R.; Simmons, Robert
by Berri, David
by Pardalos, Panos M.; Zamaraev, Victor
by Goff, Brian