Datta, Sanjib Kumar, Tanmay Biswas, and Jinarul Haque Shaikh. 2016. “ON GENERALIZED RITT ORDER OF ENTIRE FUNCTIONS REPRESENTED BY VECTOR VALUED DIRICHLET SERIES”. Italian Journal of Pure and Applied Mathematics 36 (July):155-60. https://journals.uniurb.it/index.php/ijpam/article/view/6646.