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High-wavelength-resolution extreme-ultraviolet multilayer mirrorNagata, Shin’ichi; Tsuneta, Saku; Sakao, Taro; Yoshida, Tsuyoshi; Hara, Hirohisa; Kano, Ryouhei; Ishiyama, Wakana; Murakami, Katsuhiko; Ohtan, Masayuki · ao/36/13/ao-36-13-2830.pdf · 1997