Jan Kuper. An Application of Non-Wellfounded Sets to the Foundations of Geometry. Math. Log. Q., 37(17):257-264, 1991. [doi]
@article{Kuper91,
title = {An Application of Non-Wellfounded Sets to the Foundations of Geometry},
author = {Jan Kuper},
year = {1991},
doi = {10.1002/malq.19910371702},
url = {http://dx.doi.org/10.1002/malq.19910371702},
researchr = {https://researchr.org/publication/Kuper91},
cites = {0},
citedby = {0},
journal = {Math. Log. Q.},
volume = {37},
number = {17},
pages = {257-264},
}