The variance-gamma distribution can also be expressed in terms of three inputs parameters (C,G,M) denoted after the initials of its founders. If the "C",  here, parameter is integer then the distribution has a closed form 2-EPT distribution.
The variance-gamma distribution can be expressed with three parameters: C, G, and M, representing the work of its founders. When C is an integer, it leads to a closed-form 2-EPT distribution.