1. Bach, Emmon (1962): The Order of Elements in a Transformational Grammar of German. Language 38, 263–269.
2. Bech, Gunnar (1955/57): Studien ueber das deutsche verbum infinitum. Kmpenhavn (Det Kongelige Danske Videndkabernes Selskabs Historisk-filologiske Meddelelser 35, No.2, 1955. 36, No. 6, 1957 ).
3. Besten, Hans den (1984): The Ergative Hypothesis and Free Word Order in Dutch and German. In: ToMAN, Jindrich (ed.)(1984): Studies in German Grammar. Dordrecht: Foris, 23–64.
4. Chomsky, Noam (1989): Some Notes on Economy of Derivation and Representation. In: Laka, Itziarand Mahajan, Anoop (eds.)(1989): Functional Heads and Clause Structure (MIT Working Papers in Linguistics 10 ), 43–74.
5. Chomsky,(1992): A Minimalist Program for Linguistic Theory. MIT Occasional Papers in Linguistics 1. Cambridge, MA.