@article{Li2013, author = "Nan Li and William W. Cohen and Kenneth R Koedinger", title = "{Problem Order Implications for Learning Transfer}", year = "2013", month = "1", url = "https://kilthub.cmu.edu/articles/journal_contribution/Problem_Order_Implications_for_Learning_Transfer/6476261", doi = "10.1184/R1/6476261.v1" }