Operation compatibility: a neglected contribution to dual-task costs
Journal of Experimental Psychology Human Perception & Performance (2009) - Comment
pubmed: 19331500  doi: 10.1037/a0013029  issn: 0096-1523  issn: 1939-1277 

Merel M. Pannebakker, Guido P. H. Band, K. Richard Ridderinkhof