Wilson C. Obi, "A class of generalized uniform asymptotic expansions", International Journal of Mathematics and Mathematical Sciences, vol. 1, Article ID 831850, 15 pages, 1978. https://doi.org/10.1155/S0161171278000204
A class of generalized uniform asymptotic expansions
In  E. L. Reiss obtained a multivariable expansion of the problem , , by means of a technique which does not employ the traditional method of using a secularity condition in obtaining higher order approximations. In this paper Reiss' technique is formalized and new results are established.
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