Geodesic
On regular and homological closure operators
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 51 (2010) no. 2, article no. 3, 16 p.

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     title = {On regular and homological closure operators},
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     publisher = {Andr\'ee CHARLES EHRESMANN},
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Clementino, Maria Manuel; Gutierres, Gonçalo. On regular and homological closure operators. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 51 (2010) no. 2, article  no. 3, 16 p. http://geodesic.mathdoc.fr/item/CTGDC_2010__51_2_127_0/

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