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by Gerdt, Vladimir P.; Koepf, Wolfram; Mayr, Ernst W.; et al.
by Levy, Jean-Jacques; Mayr, Ernst W.; Mitchell, John C.
by Ganzha, Viktor G.; Mayr, Ernst W.; Vorozhtsov, Evgenii V.
by Ganzha, Viktor G.; Mayr, Ernst W.; Vorozhtsov, Evgenii
by Ganzha, Victor G.; Mayr, Ernst W.; Vorozhtsov, Evgenii V.
by Mayr, Ernst W.; Promel, Hans Jurgen; Steger, Angelika
by Vladimir P. Gerdt; ?Wolfram Koepf; ?Ernst W. Mayr
by Viktor G. Ganzha; Ernst W. Mayr; Evgenii V. Vorozhtsov
by Victor G. Ganzha; ?Ernst W. Mayr; ?Evgenii V. Vorozhtsov