TY - JOUR AU - E. J. Janse van Rensburg AU - A. Rechnitzer TI - Exchange symmetries in Motzkin path and bargraph models of copolymer adsorption JO - The electronic journal of combinatorics PY - 2002 VL - 9 UR - http://geodesic.mathdoc.fr/articles/10.37236/1637/ DO - 10.37236/1637 ID - 10_37236_1637 ER -