@article{1028998821, author = {Davis, Philip J.}, title = {Packing inequalities for circles.}, journal = {Michigan Math. J.}, volume = {10}, number = {1}, year = {1963}, pages = { 25-31}, language = {en}, url = {http://dml.mathdoc.fr/item/1028998821} }
Davis, Philip J. Packing inequalities for circles.. Michigan Math. J., Tome 10 (1963) no. 1, pp. 25-31. http://gdmltest.u-ga.fr/item/1028998821/