The paper discusses asymptotic methods for integrals, in particular uniform approximations. We discuss several examples, where we apply the results to Tricomi's $Psi-$function, in particular we consider an expansion of Tricomi-Carlitz polynomials in terms of Hermite polynomials. We mention other recent expansions for orthogonal polynomials that do not satisfy a differential equation, and for which methods based on integral representations produce powerful uniform asymptotic expansions.

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Modelling, Analysis and Simulation [MAS]
Computational Dynamics

Temme, N. (1998). Recent problems from uniform asymptotic analysis of integral in particular in connection with Tricomi's $ Psi $ -function. Modelling, Analysis and Simulation [MAS]. CWI.