- Binary Numbers by Clyde Watson, Wendy Watson, May, 1977
- Cambridge Mathematics Direct 5 Numbers and the Number System and Calculations Interactive pictures by Jane Crowden, Sandy Cowling, et all May, 2001
- Cambridge Mathematics Direct 6 Numbers and the Number System and Calculations Interactive pictures by Jane Crowden, Sandy Cowling, et all September, 2001
- The CAM & Nursing Coding Manual by Inc Alternative Link Systems, Alternative Link, et all 17 July, 2001
- Harmonic Analysis in Hypercomplex Systems (Mathematics and Its Applications (Kluwer Academic Publishers), V. 434.) by Iu. M. Berezanskii, A. A. Kaliuzhnyi, et all May, 1998
- Evaluation of the Con/Span Wingwall System (Cerf Report, Number to Come) by Highway Innovative Technology Evaluation, June, 2001
- The Story of Our Numbers: The History of Arabic Numerals (Powermath) by Zelda King, January, 2004
- Two Origins of Writing Systems, Discovery of the Number ""0"" and Our Numerals by Tushar K., Dr Nag, May, 2001
- Calculus, Graphs, Numbers, Systems by Ostebee, September, 1997
- Lyapunov Functions in Differential Games by V. I. Zhukovsky, Vladislav Iosifovich Zhukovskii, et all 01 January, 2003
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