foundInShuo wen jie zi zhu / Duan Yucai zhu. - [Guang dong] : Xue hai tang, Qing Daoguang 9 nian[1829].. — Chinese Name Authority Joint Database. — http://zh.wikipedia.org/wiki/%E6%AE%B5%E7%8E%89%E8%A3%81
imprintSourceJing yun lou ji. - 2002
Ming shi shi er lun. - 1968
DUAN Yucai, politician and scholar of the Qing Dynasty. [清å¶è¡å…°è¾‘摹,黄å°æ³‰ç»˜ã€‚ / 《清代å¦è€…åƒä¼ 》第一集,清å¶è¡å…°è¾‘摹,黄å°æ³‰ç»˜ã€‚ -- Public domain -- http://commons.wikimedia.org/wiki/File:段玉è£.jpg]