1. Brandenburg F. J.: On the Intersection of Stacks and Queues, in Theoretical Computer Science, Elsevier, vol. 58, pp. 69–80, 1988
2. Lect Notes Comput Sci;B. L,1992
3. Breveglieri, L., Cherubini, A. Citrini, C., Crespi Reghizzi, S.: Multi-Pushdown Stack Languages and Grammars, International Journal of Foundation of Computer Science, World Scientific, n., pp., 1996
4. Breveglieri, L., Cherubini, A., Crespi Reghizzi, S: Syntax-Directed Scheduling, Int. Rep. 98-048, Dip. di Elettronica e Informazione, Politecnico di Milano, 1998
5. Cherubini, A., Citrini, C., Crespi Reghizzi, S., Mandrioli, D.: Breadth and Depth Grammars and Dequeue Automata International Journal of Foundations of Computer Science, World Scientific, vol. 1, n. 3, pp. 219–232, 1990