no. 3
Equationally close subframes and representation of quotient spaces
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 34 (1993) no. 3, pp. 167-183. 
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     author = {Pultr, Ale\v{s} and Tozzi, Anna},
     title = {Equationally close subframes and representation of quotient spaces},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {167--183},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {34},
     number = {3},
     year = {1993},
     mrnumber = {1239466},
     zbl = {0789.54008},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1993__34_3_167_0/}
}
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Pultr, Aleš; Tozzi, Anna. Equationally close subframes and representation of quotient spaces. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 34 (1993) no. 3, pp. 167-183. http://www.numdam.org/item/CTGDC_1993__34_3_167_0/

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