The size of the largest part of random plane partitions of large integers. Mutafchiev, Ljuben — 2006 Integers
A zero-inflated occupancy distribution: Exact results and Poisson convergence. Kolev, Nikolai; Mutafchiev, Ljuben — 2003 International Journal of Mathematics and Mathematical Sciences
Local limit approximations for Lagrangian distributions. Ljuben Mutafchiev — 1995 Aequationes mathematicae