- An Introduction to the Theory of Numbers, G.H. Hardy & E.M. Wright, Oxford University Press, 5ª edição, 1978. - An Introduction to the Theory of Numbers, Ivan Niven, Herbert S. Zuckerman & Hugh L. Montgomery, John Wiley & Sons, 5ª edição, 1991. - The History of Mathematics - an Introduction, David Burton:
McGraw Hill, 2006 (6th ed).- Mathematics in Civilization, H.L. Resnikoff & R.O. Wells Jr., Dover Publications, 1984. - Mathematics in the Time of the Pharaohs, Richard J. Gillings, Dover Publications, 1982. :