@article{CM_1970__22_2_175_0, author = {Takens, Floris}, title = {The {Lusternik-Schnirelman} categories of a product space}, journal = {Compositio Mathematica}, pages = {175--180}, publisher = {Wolters-Noordhoff Publishing}, volume = {22}, number = {2}, year = {1970}, mrnumber = {290365}, zbl = {0198.28302}, language = {en}, url = {http://archive.numdam.org/item/CM_1970__22_2_175_0/} }
Takens, Floris. The Lusternik-Schnirelman categories of a product space. Compositio Mathematica, Tome 22 (1970) no. 2, pp. 175-180. http://archive.numdam.org/item/CM_1970__22_2_175_0/
On the Lusternik-Schnirelman category, Annals of Math. 42 (1941) 333-370. | JFM | MR | Zbl
[1]Lusternik-Schnirelman category and strong category, Ill. Journal of Mathematics 11 (1967) 417-427. | MR | Zbl
[2]On spaces having the homotopy type of a C.W. complex. Trans. Amer. Math. Soc. 90 (1959) 272-280. | MR | Zbl
[3]