@article{article, title = {{On the Freyd cover of a topos.}}, publisher = {{Duke University Press}}, url = {{https://doi.org/10.1305/ndjfl/1093870454 }}, year = {{1983}}, month = {{10}}, author = {{Moerdijk I}}, doi = {{10.1305/ndjfl/1093870454}}, volume = {{24}}, journal = {{Notre Dame Journal of Formal Logic}}, issue = {{4}}, note = {{Accessed on 2025/12/08}}}