@Article{clark2004extensions, author = {Clark, J.M. and Paivio, A.}, title = {Extensions of the Paivio, Yuille, and Madigan (1968) norms}, journal = {Behavior Research Methods, Instruments, \& Computers}, year = {2004}, number = {3}, url = {http://scholar.google.de/scholar.bib?q=info:CzAMgvcRAbwJ:scholar.google.com/&output=citation&hl=de&as_sdt=2000&as_vis=1&ct=citation&cd=0}, const = {\ text} }