Adding Monotonic Counters to Automata and Transition Graphs. - Karianto Wong (Developments in Language Theory, 2005)

On Intersection Problems for Polynomially Generated Sets. - Karianto Wong; Aloys Krieg; Wolfgang Thomas (ICALP (2), 2006)

Unranked Tree Automata with Sibling Equalities and Disequalities. - Karianto Wong; Christof Löding (ICALP, 2007)

On Nondeterministic Unranked Tree Automata with Sibling Constraints. - Christof Löding; Karianto Wong (FSTTCS, 2009)

Finite automata on unranked trees: extensions by arithmetical and equality constraints. - Karianto Wong (2010)