Susan B. Niefield. Implementing finite structures in Mathematica via a skeletal topos of finite sets. Journal of Symbolic Computation, 35(2):137-151, 2003. [doi]
@article{Niefield03,
title = {Implementing finite structures in Mathematica via a skeletal topos of finite sets},
author = {Susan B. Niefield},
year = {2003},
doi = {10.1016/S0747-7171(02)00105-0},
url = {http://dx.doi.org/10.1016/S0747-7171(02)00105-0},
researchr = {https://researchr.org/publication/Niefield03},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Computation},
volume = {35},
number = {2},
pages = {137-151},
}