TY - JOUR AU - Squire, Matthew B. TI - Gray codes for -free strings. JO - The Electronic Journal of Combinatorics [electronic only] PY - 1996 VL - 3 IS - 1 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/EJC_1996__3_1_118904/ LA - en ID - EJC_1996__3_1_118904 ER -