@article{AUCMP_1987__28_2_a2,
     author = {Borceux, Francis and Pedicchio, M. Cristina},
     title = {De {Morgan's} and strong {De} {Morgan's} laws in a topos of shaves},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {9--12},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {1987},
     mrnumber = {0932734},
     zbl = {0644.18004},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_1987__28_2_a2/}
}