Matthias Jantzen and Holger Petersen.
Cancellation in context-free languages: enrichment by reduction.
In Patrice Enjalbert, Alain Finkel, and Klaus W. Wagner, editors,
Proceedings of the 10th Annual Symposium on Theoretical Aspects of
Computer Science, (STACS 93, Würzburg, Germany, February 25-27, 1993),
volume 665 of Lecture Notes in Computer Science, pages 206-215,
Berlin, Heidelberg, New York, 1993. Springer-Verlag.
@inproceedings{Jantzen+93, Address = Springer.addr, Author = {Jantzen, Matthias and Petersen, Holger}, Booktitle = {Proceedings of the 10th Annual Symposium on Theoretical Aspects of Computer Science, (STACS 93, W{\"u}rzburg, Germany, February 25--27, 1993)}, Editor = {Enjalbert, Patrice and Finkel, Alain and Wagner, Klaus W.}, Isbn = {3-540-56503-5}, Pages = {206--215}, Publisher = Springer, Series = LNCS, Title = {Cancellation in context-free languages: enrichment by reduction}, Volume = 665, Year = 1993 }