Mayo, R., Schul, Y., & Rosenthal, M. (2014). If you negate, you may forget: Negated repetitions impair memory compared with affirmative repetitions. Journal of Experimental Psychology: General, 143(4), 1541-1552. doi:10.1037/a0036122
http://memovocab.net/glossaire/glossaire_n-z/oubli-induit-par-la-negatio.html