[Si] "Distributions" : Sect 1
"Discrete distributions" : Item "The Poisson distribution" (find
it after Exercise 36).
[Si] "Distributions" : Sect 8
"Convergence in distribution" : Item "Convergence of the binomial
distribution to the Poisson" (find it after Exercise 8).
[BT] Sect 2.2 "Probability mass functions" : Item "The
Poisson random variable" (p. 78-).