by Lichtenderg, A. J | Lieberman, M. A.
by Zaslavsky, George M.
by Pinsky, Mark | Birnir, Bjorn.
by Levi, Mark.
by Wulfman, Carl E.
by Del Moral, Pierre | Penev, Spiridon.
by Cabral, Hildeberto | Brandao Dias, Lucia.
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