Multiple Solutions of Riemann-Type of Functional Equations
  Linearly independent Dirichlet L-functions satisfying the same Riemann-type of functional equation have been supposed for long time to possess off critical line non trivial zeros. We are taking a closer look into this problem and into its connection with the Generalized Riemann Hypothesis 
T. Cao-Huu, D. Ghisa and F. A. Muscutar
math.CV