. . "1963" . "许清贤" . . "許清賢" . "Ching-Hsien Hsu"@en . . "qing Xu qing xian" . . "許清賢" . "Robert C.-H Hsu"@de-DE . "R. C.-H Hsu" . . "Hsu"@en . . "Hsü" . "Qingxian" . "許慶賢" . "Ching-Hsien Hsu" . "Xu qing xian" . "Ching-Hsien"@en . "許慶賢" . "Ching-hsien" . "許淸賢" . "Robert C." . "许庆贤" . "Robert C. Hsu" . . "許淸賢" . "Ching-hsien Hsü" . "许庆贤" . "R. C.-H" . "qing" . "Qingxian Xu" . "Qingxian Xu" . "Robert Ching-Hsien" . "許慶賢" . "许清贤" . "Robert Ching-Hsien Hsu" . "Xu" . "Ching-hsien Hsu" .