\[Y_{\nu}\left(\nu z\right)\sim-\left(\frac{4\zeta}{1-z^{2}}\right)^{\frac{1}{4}%
}\left(\frac{\operatorname{Bi}\left(\nu^{\frac{2}{3}}\zeta\right)}{\nu^{\frac{%
1}{3}}}\sum_{k=0}^{\infty}\frac{A_{k}(\zeta)}{\nu^{2k}}+\frac{\operatorname{Bi%
}'\left(\nu^{\frac{2}{3}}\zeta\right)}{\nu^{\frac{5}{3}}}\sum_{k=0}^{\infty}%
\frac{B_{k}(\zeta)}{\nu^{2k}}\right),\]