\[W_{\kappa,\mu}\left(x\right)=\left(\tfrac{1}{2}\mu\right)^{-\frac{1}{4}}\*%
\left(\frac{\kappa+\mu}{e}\right)^{\frac{1}{2}(\kappa+\mu)}\*\Phi(\kappa,\mu,x%
)\*\left(U\left(\mu-\kappa,\zeta\sqrt{2\mu}\right)+\mathrm{env}\mskip-1.0muU%
\left(\mu-\kappa,\zeta\sqrt{2\mu}\right)O\left(\mu^{-\frac{2}{3}}\right)\right),\]