no. 1
Regular closure operators and compactness
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 33 (1992) no. 1, pp. 21-31. 
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     author = {Castellini, G.},
     title = {Regular closure operators and compactness},
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     pages = {21--31},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {33},
     number = {1},
     year = {1992},
     mrnumber = {1163425},
     zbl = {0773.54010},
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     url = {http://archive.numdam.org/item/CTGDC_1992__33_1_21_0/}
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Castellini, G. Regular closure operators and compactness. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 33 (1992) no. 1, pp. 21-31. http://archive.numdam.org/item/CTGDC_1992__33_1_21_0/

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