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by Wang, Xia; Halang, Wolfgang A.
by Halang, Wolfgang A.; Unger, Herwig
by Halang, Wolfgang A.; Spinczyk, Olaf
by Gumzej, Roman; Halang, Wolfgang A.
by Kyamakya, Kyandoghere; Halang, Wolfgang A.; Mathis, Wolfgang; et al.
by Halang, Wolfgang A.; Konakovsky, Rudolf M.
by Halang, Wolfgang; Fitz, Robert
by Wolfgang A. Halang