TY - JOUR AU - Havel, Ivan AU - Zelinka, Bohdan TI - On 2-periodic graphs of a certain graph operator JO - Discussiones Mathematicae. Graph Theory PY - 2001 SP - 13 EP - 30 VL - 21 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMGT_2001_21_1_a1/ LA - en ID - DMGT_2001_21_1_a1 ER -