@article{10_37236_1038,
     author = {David Bevan},
     title = {Sets of points determining only acute angles and some related colouring problems},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1038},
     zbl = {1081.05103},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1038/}
}