Godard, Danièle, Barbara Hemforth, and Jean-Marie Marandin. Negation and mood alternation in French A preliminary experimental investigation of polarity mood In Structure and evidence., 2013.

Corblin, Francis, and Lucia M. Tovena. "Negation in the simple clause in the Romance languages." In Fundamental issues in the Romance languages, edited by Danièle Godard, 263-318. Stanford: CSLI, 2010.