@article {5193,
	title = {Exact solution of a stochastic directed sandpile model},
	journal = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},
	year = {2001},
	pages = {1-4},
	doi = {10.1103/PhysRevE.63.026111},
	author = {Morten Kloster and Sergei Maslov and Chao Tang}
}
