Christoph Haase Stephan Kreutzer Joël Ouaknine James Worrell Reachability in Succinct and Parametric One-Counter Automata. 369-383 2009 CONCUR http://dx.doi.org/10.1007/978-3-642-04081-8_25 conf/concur/2009 db/conf/concur/concur2009.html#HaaseKOW09