Itziar Laka 
On the Syntax of Negation [PDF ebook] 

First Published in 1994. This is an investigation to explore certain syntactic phenomena induced by sentence negation in Basque and English. In this study of linguistics the author attempts to provide a unified account of them, based on a universal requirement on functional heads. The requirement called the Tense C-command Condition requires that all functional heads in the clause that are propositional operators should be c-commanded by the head Tense at S-structure