Chee-Kit Looi, K.-S. Lim. From bar diagrams to letter-symbolic algebra: a technology-enabled bridging. J. Comp. Assisted Learning, 25(4):358-374, 2009. [doi]
@article{LooiL09,
title = {From bar diagrams to letter-symbolic algebra: a technology-enabled bridging},
author = {Chee-Kit Looi and K.-S. Lim},
year = {2009},
doi = {10.1111/j.1365-2729.2009.00313.x},
url = {http://dx.doi.org/10.1111/j.1365-2729.2009.00313.x},
tags = { algebra},
researchr = {https://researchr.org/publication/LooiL09},
cites = {0},
citedby = {0},
journal = {J. Comp. Assisted Learning},
volume = {25},
number = {4},
pages = {358-374},
}