\[\mathsf{P}^{-\mu}_{\nu}\left(x\right)=\frac{1}{\Gamma\left(\mu+1\right)}\left(%
1-\alpha^{2}\right)^{-\mu/2}\left(\frac{1-\alpha}{1+\alpha}\right)^{(\nu/2)+(1%
/4)}\*\left(\frac{p}{x}\right)^{1/2}e^{-\mu\rho}\left(1+O\left(\frac{1}{\mu}%
\right)\right),\]