References
- Khatri , C.G. 1959 . On certain properties of power-series distributions . Biometrika , 46 : 486 – 490 .
- Neyman , J. 1965 . “ Certain chance mechanisms involving discrete distributions ” . In Classical and Contagious Discrete Distributions , Edited by: Patil , G.P. 4 – 14 . Calcutta : Statistical Publishing Society .