The bivalency effect in task switching: general and enduring
Canadian Journal of Experimental Psychology/Revue canadienne de psychologie expérimentale (2009) - Comment
pubmed: 19739903  doi: 10.1037/a0014311  issn: 1878-7290  issn: 1196-1961 

Beat Meier, Todd S. Woodward, Alodie Rey-Mermet, Peter Graf