On the GL(3) Kuznetsov Formula with applications to Symmetry Types of   families of $L$-functions
  We present an explicit approach to the GL(3) Kuznetsov formula. As an application, for a restricted class of test functions, we obtain the low-lying zero densities for the following three families: cuspidal GL(3) Maass forms phi, the symmetric square family sym^2 phi on GL(6), and the adjoint family Ad phi on GL(8). Hence we can identify their symmetry types; they are: unitary, unitary, and symplectic, respectively. 
Dorian Goldfeld and Alex Kontorovich
math.NT