TY - RPRT TI - fMRI study of effort and information processing in a working memory task. AU - J M Jansma AU - N F Ramsey AU - J A de Zwart AU - P van Gelderen AU - J H Duyn PY - 2007 DO - 10.1002/hbm.20297 UR - https://pubmed.ncbi.nlm.nih.gov/17133397/ ID - 17133397 ER -