元代四海测验中南海观测站地理位置考辨". Research on the Historical Geography of China's Frontiers 中国边疆史地研究. 1998 (2)..

^ZENG, Zhaoxuan 曾昭旋 (1990), "The Yuan-Dynasty Survey of Nanhai was in Champa: Guo Shoujing Did not Go to the Zhongsha or Xisha to Measure Latitude 元代南海测验在林邑考--郭守敬未到西中沙测量纬度 (in Chinese)", Historical Research 历史研究, 1990 (5). Among other evidence, Zeng cites a Chinese geologist who argues that the Scarborough Shoal was still submerged under water during the Yuan dynasty.

^François-Xavier Bonnet. "Geopolitics of Scarborough Shoal"(pdf): 12. Many analysts consider, in a restrictive manner, that this treaty concerned only the islands of Sibutu and Cagayan de Sulu. In fact, the unique article of this treaty is open to all islands that belonged to the Philippines during the Spanish time but would be found, in the future, outside the limits of the Treatythe men (defendant) was in the store the evening before the robbery. After the robbery the victim went to police headquarters and looked at more than ten "mug shots." No officer was in the room during this time. No identification was made. The following day the victim was shown five "mug shots." She identified one of the robbers who is not the defendant in this case. A few days later she was shown five other "mug shots." She identified the defendant. The victim testified that at no time did the police in any way say or indicate anything which would be suggestive while she viewed the "mug shots."
The record is void of any indication that the viewing of the "mug shots" was in any way suggestive. Simmons v.