1 2 “Earth from Space: North Sentinel Island”. Cơ quan vũ trụ châu Âu (ESA). Ngày 29 tháng 4 năm 2005. Truy cập ngày 1 tháng 8 năm 2015. The 72-square-kilometre-area North Sentinel Island is home to the fiercely independent Sentinelese tribe, known to reject any contact with outsiders. The Indian government carried out its 2001 census of the Island from a distance, counting a total population of 21 males and 18 females, although other estimates range higher, to a maximum of 500.
↑ Enumeration of Primitive Tribes in A&N Islands: A Challenge (Report). Archived from the original on ngày 11 tháng 12 năm 2014. "The first batch could identify 31 Sentinelese. The second batch could count altogether 39 Sentinelese consisting of male and females adults, children and infants. During both the contacts the enumeration team tried to communicate with them through some Jarawa words and gestures, but, Sentinelese could not understand those verbal words."
↑ Harrer, Heinrich (1977). Die letzten Fünfhundert: Expedition zu d. Zwergvölkern auf d. Andamanen [The last five hundred: Expedition to the dwarf peoples in the Andaman Islands] (tiếng Đức). Berlin: Ullstein. ISBN 3-550-06574-4. OCLC 4133917.
