A converse theorem for double Dirichlet series is established. As an application, we show that certain zeta functions introduced by Shintani are actually Weyl group multiple Dirichlet series associated to metaplectic Eisenstein series on $GL(2)$.
"A converse theorem for double Dirichlet series and Shintani zeta functions." J. Math. Soc. Japan 66 (2) 449 - 477, April, 2014. https://doi.org/10.2969/jmsj/06620449