Simple asymmetric exclusion model and lattice paths: bijections and involutions R.Brak and J. W. Essam, J. Phys. :Math. Theor. 45 494007 (22pp) (2012)

A combinatorial derivation of the PASEP stationary state. , R. Brak, S. Corteel, J. W. Essam, R. Parviainen and A. Rechitzer, Electronic Journal of Combinatorics 13 #R108 1-23 (2006)

Asymmetric Exclusion Model and Weighted Lattice Paths , R. Brak and J. W. Essam, Journal of Physics A: Mathematical and General, 37 4183-4217 (2004)