Remarks on duality for $\Sigma$-groups. I. Products and coproducts
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 30 (1989) no. 1, pp. 45-59.
@article{CTGDC_1989__30_1_45_0,
author = {Higgs, Denis},
title = {Remarks on duality for $\Sigma$-groups. I. Products and coproducts},
journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
pages = {45--59},
publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
volume = {30},
number = {1},
year = {1989},
zbl = {0683.20044},
language = {en},
url = {archive.numdam.org/item/CTGDC_1989__30_1_45_0/}
}
Higgs, Denis. Remarks on duality for $\Sigma$-groups. I. Products and coproducts. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 30 (1989) no. 1, pp. 45-59. http://archive.numdam.org/item/CTGDC_1989__30_1_45_0/

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