Editing Null-subject language (section)

==Bibliography==
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* Barbosa, Pilar MEL Duarte, and M Kato. (2005) Null Subjects in European and Brazilian Portuguese.  Journal of Portuguese Linguistics.  ([http://repositorium.sdum.uminho.pt/bitstream/1822/6466/1/Barbosa%2520Duarte%2520e%2520Kato%2520.pdf])
* Biberauer, Theresa, Anders Holmberg, Ian Roberts and Michele Sheehan (eds). 2010. Parametric Variation: Null subjects in Minimalist Theory. Cambridge: Cambridge University Press.
* Cook, Manuela. (1997) A Theory for the Interpretation of Forms of Address in the Portuguese Language. Hispania, Vol 80, Nº 3, AATSP, USA
* Chomsky, Noam 1981. Lectures on government and binding. Studies in Generative Grammar 9. Dordrecht: Foris.
* Chomsky, Noam 1982. Concepts and Consequences of the Theory of Government and Binding. The MIT Press, Cambridge, Mass.
* D’Alessandro, Roberta. 2014. The Null Subject Parameter: Where are we and where are we headed? Ms. Leiden University Centre for Linguistics.
* Gilligan, Gary Martin. 1987. “A crosslinguistic approach to prodrop parameter.” PhD. dissertation, University of Southern California, Los Angeles.
* Holmberg, Anders. 2005. “Is there a little pro? Evidence from Finnish.” Linguistic Inquiry 36:533-564.
* Jaeggli, Oswaldo and Ken Safir 1987 (eds) The null subject parameter. Dordrecht: Kluwer.
* Kučerová, Ivona 2014. “The Syntax of Null Subjects.” Syntax 17:2, 132167.
* Perlmutter, David 1971. Deep and surface constraints in syntax. New York: Holt, Rinehart and Winston.
* Rizzi, Luigi  1986. 'Null Objects in Italian and the Theory of pro' Linguistic Inquiry 17:1986. pp.&nbsp;501–557.
* Rizzi, Luigi 1982. Issues in Italian Syntax, Foris Publications, Dordrecht.
* Vikner, Sten. 1995. Verb Movement and Expletive Subjects in the Germanic Languages, Oxford University Press, Oxford.
* Zanuttini, Raffaella. 2008. Microcomparative syntax in English verbal agreement. Talk at NELS 39, November 2008.