Geodesic
The genus of $G$-spaces and topological lower bounds for chromatic numbers of hypergraphs
Fundamentalʹnaâ i prikladnaâ matematika, Tome 11 (2005) no. 4, pp. 33-48.

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Lower bounds for chromatic numbers of hypergraphs via genus and cohomological index of special complexes ($\operatorname{Hom}$- and $\operatorname{JHom}$-complexes) are given. 
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A. Yu. Volovikov. The genus of $G$-spaces and topological lower bounds for chromatic numbers of hypergraphs. Fundamentalʹnaâ i prikladnaâ matematika, Tome 11 (2005) no. 4, pp. 33-48. http://geodesic.mathdoc.fr/item/FPM_2005_11_4_a2/

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