Author: Urs Format: MarkdownItexI have recorded citations for integral representations of Bessel functions ([here](https://ncatlab.org/nlab/show/Bessel+function#IntegralRepresentations)) needed in the computation of the singular support of the Klein-Gordon propagators ([here](https://ncatlab.org/nlab/show/advanced+and+retarded+causal+propagators#WaveFrontSetsOfPropagatorsForKleinGordonOperatorOnMinkowskiSpacetime))
I have recorded citations for integral representations of Bessel functions (here) needed in the computation of the singular support of the Klein-Gordon propagators (here)