Schatten class little Hankel operators on Bergman spaces in bounded symmetric domains

Suppose $\alpha >-1$, $\frac{a(r-1)}{N+\alpha }<p<1$ and f belongs to the Bergman space $A_{\alpha }^2\left(\Omega \right)$ in the bounded symmetric domain Ω of $C^n$. We prove that the little Hankel operator $h_{\overline{f}}^{\alpha }$ acting on $A_{\alpha }^2\left(\Omega \right)$ is in the Schatten p-class if and only if f is in the Besov space $B_p\left(\Omega \right)$.