Article Van Nooten, B.; (1993)
Binary numbers in Indian antiquity (/isis/citation/CBB000045098/)

Article Mukherjee, R. N.; (1977)
Background to the discovery of the symbol for zero (/isis/citation/CBB000015563/)

Article Hayashi, Takao; (1988)
The invention of zero as a number. (In Japanese) (/isis/citation/CBB000040311/)

Book Becker, Wilhelm; (1995)
Frühformen indisch-arabischer Ziffern in einer Handschrift des Soester Stadtarchivs (/isis/citation/CBB000073671/)

Article Jain, L. C.; (1977)
Divergent sequences locating tansfinite sets in Trilokasāra (/isis/citation/CBB000015590/)

Article Ruegg, D. Seyfort; (1978)
Mathematical and linguistic models in Indian thought: The case of zero and śunyata (/isis/citation/CBB000006806/)

Book Meyer, Heinz; (1987)
Lexikon der mittelalterlichen Zahlenbedeutungen (/isis/citation/CBB000060752/)

Article Joseph, George Gheverghese; (2008)
A Brief History of Zero (/isis/citation/CBB001510408/)

Chapter Sesiano, Jacques; (1985)
Un système artificiel de numération du Moyen Age (/isis/citation/CBB000046821/)

Article Struik, Dirk J.; (1982)
Minoan and Mycenaean numerals (/isis/citation/CBB000024190/)

Article Berggren, J.L.; (1997)
Numbers at work in medieval Islam (/isis/citation/CBB000081073/)

Book Guitel, Geneviève; (1975)
Histoire comparée des numérations écrites (/isis/citation/CBB000027057/)

Article Lam, Lay-Yong; (1987)
Linkages: Exploring the similarities between the Chinese rod numeral system and our numeral system (/isis/citation/CBB000065090/)

Article Keyser, Paul; (1988)
The origin of the Latin numerals 1 to 1000 (/isis/citation/CBB000048992/)

Article Sarma, Sreeramula Rajeswara; (2012)
The Kaṭapayādi System of Numerical Notation and Its Spread Outside Kerala (/isis/citation/CBB001210557/)

Article Kak, Subhash C.; (1997)
Three old Indian values of pi (/isis/citation/CBB000077478/)

Book Crump, Thomas; (1990)
The anthropology of numbers (/isis/citation/CBB000035524/)

Book Flegg, Graham; (1989)
Numbers through the ages (/isis/citation/CBB000036010/)

Chapter Spiesser, Maryvonne; (1988)
Deux aspects de l'arithmétique pythagoricienne: Nombres figurés et moyennes (/isis/citation/CBB000031621/)

Book Flegg, Graham; (1983)
Numbers: Their history and meaning (/isis/citation/CBB000018476/)