\[\mathbf{M}_{\nu}\left(\lambda\nu\right)\sim-\frac{(\frac{1}{2}\lambda\nu)^{\nu%
-1}}{\sqrt{\pi}\Gamma\left(\nu+\frac{1}{2}\right)}\sum_{k=0}^{\infty}\frac{k!c%
_{k}(i\lambda)}{\nu^{k}},\]