@article{10_2140_agt_2017_17_957,
     author = {Guerra, Lorenzo},
     title = {Hopf ring structure on the mod p cohomology of symmetric groups},
     journal = {Algebraic and Geometric Topology},
     pages = {957--982},
     year = {2017},
     volume = {17},
     number = {2},
     doi = {10.2140/agt.2017.17.957},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2017.17.957/}
}