TY - JOUR AU - Musiker, Gregg AU - Schiffler, Ralf TI - Cluster algebras of unpunctured surfaces and snake graphs JO - Discrete mathematics & theoretical computer science PY - 2009 VL - DMTCS Proceedings vol. AK, 21st International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2009) PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.2685/ DO - 10.46298/dmtcs.2685 LA - en ID - DMTCS_2009_special_256_a7 ER -