@article{10_2140_agt_2018_18_1323,
     author = {Cahn, Patricia and Gluck, Herman and Nuchi, Haggai},
     title = {Germs of fibrations of spheres by great circles always extend to the whole sphere},
     journal = {Algebraic and Geometric Topology},
     pages = {1323--1360},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {2018},
     doi = {10.2140/agt.2018.18.1323},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2018.18.1323/}
}