Analysis of information sources in references of the Wikipedia article "Nine-dash line" in English language version.
Unlike Beijing, however, Taipei uses the original eleven dashes, since the other two dashes in the Gulf of Tonkin were only removed under the approval of Premier Zhou Enlai in 1953, four years after the establishment of the PRC. Li Jinming and Li Dexia, 'The Dotted Line on the Chinese Map of the South China Sea: A Note'.
十一段線係出現於民國36年(1947年)12月1日由內政部公布之「南海諸島位置圖」
人民日报:中国在南海断续线内的历史性权利不容妄议和否定