McNay, Lois “Subject, Psyche and Agency : The Work of Judith Butler” Theory, Culture & Society 16.2 (1999) : 175-93. McNay document download here
McNay’s article is a thorough examination of Butler’s conception of performativity and agency. McNay then proceeds to compliment Butler with the work of Bordieu and Castoriadis. I should really follow up with notes but I don’t have the time right now.