@article{GT_2001_5_2_a11,
     author = {Eastwood, Michael and Norbury, Paul},
     title = {A proof of {Atiyah{\textquoteright}s} conjecture on configurations of four points in {Euclidean} three-space},
     journal = {Geometry & topology},
     pages = {885--893},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {2001},
     doi = {10.2140/gt.2001.5.885},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2001.5.885/}
}