@article{article, title  = {{Proper maps of toposes}},

 url = {{}},

 year = {{2001}},

 month = {{1}},

 author = {{Moerdijk I and Vermeulen JJC}},

 journal = {{Memoirs of the American Mathematical Society}},

 issue = {{711}},

 pages = {{1-107}},

 note = {{Accessed on 2024/12/22}}}