A list of Poisson's works, drawn up by himself, is given at the end of Arago's biography.
So highly did he think of Poisson's memoir that he made a copy of it with his own hand, which was found among his papers after his death.
The result, however, of Poisson's investigation is practically equivalent to that already obtained by Laplace.
As these indices represent discontinuous data, it would be preferable to use the negative binomial or the Poisson distribution.
The POISSON keyword returns a random deviate drawn from a Poisson distribution with that mean.