Pablé, Adrian, et al. “Nonstandard Were and the Nonstandard Forms of the Preterite Negative of to Be in Nineteenth Century New England Civil War Letters and Literary Dialect Portrayals”. Studia Anglica Posnaniensia, vol. 45, no. 2, Jan. 2010, pp. 59-80, doi:10.2478/v10121-009-0016-3.