Michael Hartwig. On the Density of Regular and Context-Free Languages. In My T. Thai, Sartaj Sahni, editors, Computing and Combinatorics, 16th Annual International Conference, COCOON 2010, Nha Trang, Vietnam, July 19-21, 2010. Proceedings. Volume 6196 of Lecture Notes in Computer Science, pages 318-327, Springer, 2010. [doi]
Abstract is missing.