Journal Article
Schmiedek, F.,
Hildebrandt, A.,
Lövdén, M.,
Wilhelm, O., &
Lindenberger, U. (2009). Complex span versus updating tasks of working memory: the gap is not that deep.
Journal of Experimental Psychology: Learning, Memory, and Cognition,
35(4), 1089–1096. https://doi.org/10.1037/a0015730