The Lusternik-Schnirelman categories of a product space
Takens, Floris
Compositio Mathematica, Tome 22 (1970), p. 175-180 / Harvested from Numdam
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@article{CM_1970__22_2_175_0,
     author = {Takens, Floris},
     title = {The Lusternik-Schnirelman categories of a product space},
     journal = {Compositio Mathematica},
     volume = {22},
     year = {1970},
     pages = {175-180},
     mrnumber = {290365},
     zbl = {0198.28302},
     language = {en},
     url = {http://dml.mathdoc.fr/item/CM_1970__22_2_175_0}
}

Takens, Floris. The Lusternik-Schnirelman categories of a product space. Compositio Mathematica, Tome 22 (1970) pp. 175-180. http://gdmltest.u-ga.fr/item/CM_1970__22_2_175_0/

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