1. Plummer, J.D., Deal, M.D., and Griffin, P.B.: ‘Silicon VLSI technology: fundamentals, practice, and modeling’, (Prentice Hall, New York, USA 2000)
2. http://en.wikipedia.org/wiki/UNIVAC_I
3. http://www.kurzweilai.net/articles/art0134.html?printable=1