Discrete Stable and Casual Stable Random Variables
  Here we introduce some new classes of discrete stable random variables, which are useful for understanding of a new general notion of stability of random variables called us as casual stability. There are given some examples of casual and discrete stable random variables. We also propose a class of discrete stable random variables for a description of rating of scientific work. 
Lev B. Klebanov and Lenka Sl\'amov\'a
math.PR