https://www.maths.ed.ac.uk/~v1ranick/papers/satobook.pdf
http://pi.math.cornell.edu/~hatcher/AT/ATpage.html
https://www.math.u-psud.fr/~paulin/notescours/cours_topoalg.pdf
https://ia802902.us.archive.org/27/items/in.ernet.dli.2015.141320/2015.141320.Algebraic-Topology.pdf
https://renemages.wordpress.com/2010/03/01/topologie-algebrique/
https://renemages.wordpress.com/les-mathematiques/topologie-algebrique/
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