Bakhadyr Khoussainov Jiamou Liu Mia Minnes Unary Automatic Graphs: An Algorithmic Perspective. 542-553 2008 TAMC http://dx.doi.org/10.1007/978-3-540-79228-4_47 conf/tamc/2008 db/conf/tamc/tamc2008.html#KhoussainovLM08