Author	Title	MSC2020 Area
Bleistein, Norman	Asymptotic expansions of integrals	41 Approximations and expansions
Boor, Carl	A Practical Guide to Splines	41 Approximations and expansions
Copson, E.T.	Asymptotic Expansions	41 Approximations and expansions
Copson, E.T.	Asymptotic Expansions	41 Approximations and expansions
Erdelyi, A	Asymptotic Expansion	41 Approximations and expansions
Jackson, Dunham	The Theory of Approximation	41 Approximations and expansions
Nachbin, Leopoldo	Elements of Approximation Theory	41 Approximations and expansions
Schumaker, Larry	Spline Functions: Basic Theory	41 Approximations and expansions
Werner, Helmut	Vorlesung uber Approximationstheorie	41 Approximations and expansions