Geodesic
Approaches to the summability of divergent multidimensional integrals
Sbornik. Mathematics, Tome 194 (2003) no. 8, pp. 1137-1166

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Under discussion are various approaches to the concept of summability (finding the finite part – f.p. ) of divergent integrals with integrand represented as a product of two functions, one with a parameter-dependent non-integrable singularity at one point of the integration and the other absolutely integrable. A study is made of summability methods which are based on the expansion of the absolutely integrable function in a Taylor series with centre at the singular point (f.p.), on the analytic continuation with respect to the parameter of the singularity (a.f.p.), and on integration by parts (f.p.p.). Formulae of changes of variables in such integrals are presented. 
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     author = {G. M. Vainikko and I. K. Lifanov},
     title = {Approaches to the summability of divergent multidimensional integrals},
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G. M. Vainikko; I. K. Lifanov. Approaches to the summability of divergent multidimensional integrals. Sbornik. Mathematics, Tome 194 (2003) no. 8, pp. 1137-1166. http://geodesic.mathdoc.fr/item/SM_2003_194_8_a2/