@article{CTGDC_1992__33_1_3_0,
     author = {Pultr, A. and Tozzi, A.},
     title = {Notes on {Kuratowski-Mr\'owka} theorems in point-free context},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {3--14},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {33},
     number = {1},
     year = {1992},
     mrnumber = {1163423},
     zbl = {0772.54016},
     language = {en},
     url = {http://archive.numdam.org/item/CTGDC_1992__33_1_3_0/}
}