1. Bresnan, J., R. M. Kaplan, S. Peters, and A. Zaenen: 1982, ‘Cross-Serial Dependencies in Dutch’, Linguistic Inquiry
13, 613–635.
2. Chomsky, N.: 1963, ‘Formal Properties of Grammars’, in R. D. Luce, R. R. Bush, and E. Galanter (eds.), Handbook of Mathematical Psychology, Volume II, John Wiley, New York, pp. 323–418.
3. Culy, C. D.: 1983, ‘An Extension of Phrase Structure Rules and its Application to Natural Language’, Master’s thesis, Stanford University, Stanford, California (May).
4. Culy, C. D.: 1985, ‘The Complexity of the Vocabulary of Bambara’, Linguistics and Philosophy 8, pp. 345–351.
5. Gazdar, G.: 1982, ‘Phrase Structure Grammar’, in P. Jacobson and G. K. Pullum (eds.), The Nature of Syntactic Representation, D. Reidel, Dordrecht.