@article{10_4153_CMB_1969_096_7,
     author = {Folkman, J. H. and Graham, R. L.},
     title = {A {Packing} {Inequality} for {Compact} {Convex} {Subsets} of the {Plane}},
     journal = {Canadian mathematical bulletin},
     pages = {745--752},
     year = {1969},
     volume = {12},
     number = {6},
     doi = {10.4153/CMB-1969-096-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-096-7/}
}