no. 2
The structural components of a compact connected semigroup with 1
Séminaire Albert Châtelet et Paul Dubreil, Tome 19 (1965-1966) no. 2, Exposé no. 20, 8 p. 
@article{SD_1965-1966__19_2_A6_0,
     author = {Hofmann, Karl Heinrich},
     title = {The structural components of a compact connected semigroup with 1},
     journal = {S\'eminaire Albert Ch\^atelet et Paul Dubreil},
     note = {talk:20},
     pages = {1--8},
     year = {1965-1966},
     publisher = {Secr\'etariat math\'ematique},
     volume = {19},
     number = {2},
     zbl = {0203.02302},
     language = {en},
     url = {https://www.numdam.org/item/SD_1965-1966__19_2_A6_0/}
}
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Hofmann, Karl Heinrich. The structural components of a compact connected semigroup with 1. Séminaire Albert Châtelet et Paul Dubreil, Tome 19 (1965-1966) no. 2, Exposé no. 20, 8 p.. https://www.numdam.org/item/SD_1965-1966__19_2_A6_0/

Hofmann (K.H.) and Mostert (P.S.). - Elements of compact semigroups (à paraître). | Zbl