\[B_{n}\left(-z\right)=\begin{cases}-(\ifrac{2}{\sqrt{\pi}})\sin\left(\tfrac{1}{%
2}p\pi\right)z^{-n/4}\left(\sin\left(\zeta-\tfrac{1}{4}\pi\right)+e^{\left|\Im%
\zeta\right|}O\left(\zeta^{-1}\right)\right),&\left|\operatorname{ph}z\right|%
\leq 2p\pi-\delta,n\text{ odd},\\
(\ifrac{1}{\sqrt{\pi}})\sin\left(p\pi\right)z^{-n/4}e^{-\zeta}\left(1+O\left(%
\zeta^{-1}\right)\right),&\left|\operatorname{ph}z\right|\leq 3p\pi-\delta,n%
\text{ even}.\end{cases}\]