@article{10_2140_agt_2014_14_1541,
     author = {Koschorke, Ulrich},
     title = {Nielsen coincidence numbers, {Hopf} invariants and spherical space forms},
     journal = {Algebraic and Geometric Topology},
     pages = {1541--1575},
     year = {2014},
     volume = {14},
     number = {3},
     doi = {10.2140/agt.2014.14.1541},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2014.14.1541/}
}