TY - JOUR AU - Primož Potočnik AU - Pablo Spiga AU - Gabriel Verret TI - A census of 4-valent half-arc-transitive graphs and arc-transitive digraphs of valence two JO - Ars Mathematica Contemporanea PY - 2015 SP - 133 EP - 148 VL - 8 IS - 1 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/articles/10.26493/1855-3974.559.c6c/ DO - 10.26493/1855-3974.559.c6c LA - en ID - 10_26493_1855_3974_559_c6c ER -