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by Maindl, Thomas I.; Varvoglis, Harry; Dvorak, Rudolf
by Dvorak, Rudolf
by Dvorak, Rudolf; Lhotka, Christoph
by Dvorak, Rudolf; Freistetter, F.; Kurths, Jürgen
by Dvorak, Rudolf; Henrard, Jacques
by Dvorak, Rudolf; Ferraz-Mello, Sylvio
by Dvorak, Rudolf; Souchay, Jean
by Editor: Rudolf Dvorak (Astronomical Institute, Univ. Vienna)
by Souchay, Jean J.; Dvorak, Rudolf