TY - JOUR AB - We construct continuum many non-isomorphic countable digraphs which are highly arc transitive, have finite out-valency and infinite in-valency, and whose automorphism groups are primitive. © 2009 Elsevier B.V. All rights reserved. AU - Emms,J AU - Evans,DM DO - 10.1016/j.disc.2009.02.008 EP - 4480 PY - 2009/// SN - 0012-365X SP - 4475 TI - Constructing continuum many countable, primitive, unbalanced digraphs T2 - Discrete Mathematics UR - http://dx.doi.org/10.1016/j.disc.2009.02.008 VL - 309 ER -