On a relation between $\widetilde {\rm SL}\sb{2}$ cusp forms and cusp forms on tube domains associated to orthogonal groups

S. Rallis, G. Schiffmann
1981 Transactions of the American Mathematical Society  
where the summation is over Te equivalence classes in £ n W and e(£) = order(rei) (where T£,i is the stabilizer in Te of £). This Dirichlet series has several
doi:10.1090/s0002-9947-1981-0590410-7 fatcat:w5wavb62dnbd3lcttih5dxpq5q