1. Visibly pushdown languages;Alur,2004
2. Adding nesting structure to words;Alur;J. ACM,2009
3. Input-driven languages are recognized in logn space;von Braunmühl,1985
4. Synchronization of pushdown automata;Caucal,2006
5. Minimizing variants of visibly pushdown automata;Chervet,2007