@article{10_1017_S0017089500003487,
     author = {Burmester, M. and Forcade, R. and Jacobs, E.},
     title = {Circles of numbers},
     journal = {Glasgow mathematical journal},
     pages = {115--119},
     year = {1978},
     volume = {19},
     number = {2},
     doi = {10.1017/S0017089500003487},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003487/}
}