%0 Journal Article %A Borceux, Francis %A Pedicchio, M. Cristina %T De Morgan's and strong De Morgan's laws in a topos of shaves %J Acta Universitatis Carolinae. Mathematica et Physica %D 1987 %P 9-12 %V 28 %N 2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_1987__28_2_a2/ %G en %F AUCMP_1987__28_2_a2