S. S. Abhyankar. Algebraic Geometry for Scientists and Engineers. American Mathematical Society (1990).
 M. Abramowitz and I. Stegun (Eds.). Handbook of Mathematical Functions. Dover Publications (1965).
 F. S. Acton. Numerical Methods that usually Work. The Mathematical Association of America (1990).
 G. Arfken. Mathematical Methods for Physicists. Academic Press (1970).
 U. M. Ascher, R. M. M. Mattheij and R. D. Russell. Numerical Solution of Boundary Value Problems for ordinary Differential Equations. Society for Industrial and Applied Mathematics (1995).
 U. M. Ascher and L. R. Petzold. Computer Methods of Ordinary Differential Equations and Differential-Algebraic Equations. Society for Industrial and Applied ...