The Recent Critical Heritage: a supplemental bibliography for your investigation:
Adelman, Janet. "Iago's Alter Ego: Race as Projection in Othello." Shakespeare Quarterly 48.2 (1997): 125-44.
Gilbert, Anthony. "Techniques of Persuasion in Julius Caesar and Othello." Neophilologus 81.2 (1997): 309-23.
Hodgdon, Barbara. "Race-Ing Othello, Re-Engendering White-Out." Shakespeare, the Movie: Popularizing the Plays on Film, TV, and Video.Ed. Lynda Boose and Richard Burt. London: Routledge, 1997. 23-44.
Lupton, Julia Reinhard. "Othello Circumcised: Shakespeare and the Pauline Discourse of Nations." Representations 57 (1997): 73-89.
Magnusson, Lynne. "'Voice Potential': Language and Symbolic Capital in Othello." Shakespeare Survey 50 (1997): 91-99.
Matz, Robert. "Slander, Renaissance Discourses of Sodomy, and Othello." ELH 66.2 (1999): 261-76.
Neill, Michael. "'Mulattos,' 'Blacks,' and 'Indian Moors': Othello and Early Modern Constructions of Human Difference." Shakespeare Quarterly 49.4 (1998): 361-74.
Newman, Karen. "'And Wash the Ethiop White': Femininity and the Monstrous in Othello." Fashioning Femininity and English Renaissance Drama. Chicago: U of Chicago P, 1991. 72-93.
Parker, Patricia. "Fantasies of 'Race' and 'Gender': Africa, Othello, and Bringing to Light." Women, "Race," and Writing in the Early Modern Period. Ed. Margo Hendricks and Patricia Parker. New York: Routledge, 1994. 84-100.
Royster, Francesca T. "The 'End of Race' and the Future of Early Modern Cultural Studies." Shakespeare Studies 26(1998): 59-69.
Slights, Camille Wells. "Slaves and Subjects in Othello." Shakespeare Quarterly 48.4(1997): 377-90.
Stallybrass, Peter. "Patriarchal Territories: The Body Enclosed." Rewriting the Renaissance: The Discourses of Sexual Difference in Early Modern Europe. Ed. Margaret W. Ferguson, Maureen Quilligan, and Nancy Vickers. Chicago: U of Chicago P, 1986. 123-42.
Velz, John W. "Judean and Indian Yet Once Again." Analytical & Enumerative Bibliography 10.1(1999): 21-8.
Vitkus, Daniel J. "Turning Turk in Othello: The Conversion and Damnation of the Moor." Shakespeare Quarterly 48.2(1997): 145-76.
Watson, Robert N. "Othello as Protestant Propaganda." Religion and Culture in Renaissance England. Ed. Claire McEachern and Debora Shuger. Cambridge: Cambridge UP, 1997. 234-57.