Derek H. Sleeman. An Attempt to Understand Students' Understanding of Basic Algebra. Cognitive Science, 8(4):387-412, 1984. [doi]
@article{Sleeman84,
title = {An Attempt to Understand Students' Understanding of Basic Algebra},
author = {Derek H. Sleeman},
year = {1984},
doi = {10.1207/s15516709cog0804_4},
url = {http://dx.doi.org/10.1207/s15516709cog0804_4},
researchr = {https://researchr.org/publication/Sleeman84},
cites = {0},
citedby = {0},
journal = {Cognitive Science},
volume = {8},
number = {4},
pages = {387-412},
}