RAMACHANDRA, K.; SANKARANARAYANAN, A. On the Zeros of a Class of Generalised Dirichlet Series-XVI. MATHEMATICA SCANDINAVICA, [S. l.], v. 75, p. 178–184, 1994. DOI: 10.7146/math.scand.a-12513. Disponível em: https://tidsskrift.dk/math/article/view/12513. Acesso em: 14 aug. 2026.