↑ Williams, Scott W. (2005). "Sebuah Objek Matematik Lama". Ahli-ahli Matematik Diaspora Afrika. Jabatan Matematik Buffalo SUNY. Dicapai pada 2006-05-06.
↑ Thom, Alexander and Archie Thom, "The metrology and geometry of Megalithic Man," m.s 132-151 in C.L.N. Ruggles, ed., Records in Stone: Papers in memory of Alexander Thom, (Cambridge: Percetakan Universiti Cambridge, 1988) ISBN 0-521-33381-4
↑ Pearce, Ian G. (2002). "Kebudayaan India awal - tamadun Indus". Matematik India: Penyelarasan Ketidakseimbangan. Pusat Pengajian Matematik dan Sains Pengiraan Universiti St Andrews. Dicapai pada 2006-05-06.
↑ Aaboe, Asger (1998). Episodes from the Early History of Mathematics. New York: Random House. halaman 30–31.
↑ Martin Bernal, "Animadversions on the Origins of Western Science", m.s. 72-83 dalam edisi Michael H. Shank, The Scientific Enterprise in Antiquity and the Middle Ages, (Chicago: Univ. of Chicago Pr.) 2000; untuk bukti-bukti matematik, lihat m.s. 75.
↑ Grattan-Guinness, Ivor (1997). The Rainbow of Mathematics: A History of the Mathematical Sciences. W.W. Norton. ISBN 0-393-32030-8.
↑ Estela A. Gavosto, Steven G. Krantz, William McCallum, Editors, Contemporary Issues in Mathematics Education, Cambridge University Press, 1999, ISBN 0-521-65471-8
