@article{01760361,
title = {A proof of Atiyah's conjecture on configurations of four points in Euclidean three-space.},
journal = {Geometry \& Topology},
volume = {5},
year = {2001},
pages = {885-893},
doi = {10.2140/gt.2001.5.885},
zbl = {1002.51013},
language = {en},
url = {http://dml.mathdoc.fr/item/01760361}
}
Eastwood, Michael; Norbury, Paul. A proof of Atiyah's conjecture on configurations of four points in Euclidean three-space.. Geometry & Topology, Tome 5 (2001) pp. 885-893. doi : 10.2140/gt.2001.5.885. http://gdmltest.u-ga.fr/item/01760361/