A homotopy double groupoid of a Hausdorff space.
Brown, Ronald ; Hardie, Keith A. ; Kamps, Klaus Heiner ; Porter, Timothy
Theory and Applications of Categories [electronic only], Tome 10 (2002), p. 71-93 / Harvested from The Electronic Library of Mathematics
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Publié le : 2002-01-01
EUDML-ID : urn:eudml:doc:121824 
@article{01699522,
     title = {A homotopy double groupoid of a Hausdorff space.},
     journal = {Theory and Applications of Categories [electronic only]},
     volume = {10},
     year = {2002},
     pages = {71-93},
     zbl = {0986.18010},
     language = {en},
     url = {http://dml.mathdoc.fr/item/01699522}
}

Brown, Ronald; Hardie, Keith A.; Kamps, Klaus Heiner; Porter, Timothy. A homotopy double groupoid of a Hausdorff space.. Theory and Applications of Categories [electronic only], Tome 10 (2002) pp. 71-93. http://gdmltest.u-ga.fr/item/01699522/