Bicoloured Dyck Paths and the Contact Polynomial for n Non-Intersecting Paths in a Half-Plane Lattice. - Richard Brak; John W. Essam (Electron. J. Comb., 2003)

A Combinatorial Derivation of the PASEP Stationary State. - Richard Brak; Sylvie Corteel; John W. Essam; Robert Parviainen; Andrew Rechnitzer (Electron. J. Comb., 2006)