Asymptotic expansion of the lattice scalar propagator in coordinate   space
  The asymptotic expansion of the massive scalar field propagator on a n-dimensional lattice is derived. The method used is based on the evaluation of the asymptotic expansion of the modified Bessel function $I_{\nu}(\nu^{2} \beta)$ as the order $\nu$ grows to infinity. 
Beatrice Paladini and James C. Sexton