1. Bickerton, Derek & Givon, Talmy. (1976). 'Pidginization and syntactic change: from SXV and VSX to SVX'. In Sanford B. Steever, Carol A. Walker, & Salicoco S. Mufwene (eds): Papers from the Parasession on Diachronic Syntax, 9-39. Chicago: Chicago Linguistic Society
2. Comrie, Bernard. (1989). Language universals and linguistic typology. 2nd ed. Oxford: Blackwell/Chicago: University of Chicago Press
3. Comrie, Bernard. Forthcoming. 'How exotic are European languages: The case of the relative clause'. In Ekkehard Konig & Martin Haspelmath (eds.): EURPTYP, vol. 10. Berlin: Mounton de Gruyter
4. Eco, Umberto. (1993). La ricerca della lingua perfetta [The search for the perfect language ].(Fare l'Europa.) Roma/Bari: Laterza
5. Forster, Peter G. (1982). The Esperanto movement. (Contributions to the Sociology of Language, 32.) The Hague/Paris/New York: Mouton 10.1515/9783110824568