TY - JOUR AU - Guoce Xin AU - Jing-Feng Xu TI - A short approach to Catalan numbers modulo \(2^r\) JO - The electronic journal of combinatorics PY - 2011 VL - 18 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.37236/664/ DO - 10.37236/664 ID - 10_37236_664 ER -