TY - JOUR AU - Eric S. Egge AU - Toufik Mansour TI - Permutations which avoid 1243 and 2143, continued fractions, and Chebyshev polynomials JO - The electronic journal of combinatorics PY - 2002 VL - 9 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.37236/1679/ DO - 10.37236/1679 ID - 10_37236_1679 ER -