Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Kenneth R. Koedinger, Martha W. Alibali, Mitchell J. Nathan. Trade-Offs Between Grounded and Abstract Representations: Evidence From Algebra Problem Solving. Cognitive Science, 32(2):366-397, 2008. [doi]
Abstract is missing.