@article{10_4007_annals_2019_190_3_1,
     author = {Rob Schneiderman and Peter Teichner},
     title = {The group of disjoint 2-spheres in 4-space},
     journal = {Annals of mathematics},
     pages = {669--750},
     publisher = {mathdoc},
     volume = {190},
     number = {3},
     year = {2019},
     doi = {10.4007/annals.2019.190.3.1},
     mrnumber = {4024561},
     zbl = {07134621},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2019.190.3.1/}
}