@article{10_4153_CMB_1966_035_5,
     author = {Schaer, J.},
     title = {The {Densest} {Packing} of {Six} {Spheres} in a {Cube}},
     journal = {Canadian mathematical bulletin},
     pages = {275--280},
     year = {1966},
     volume = {9},
     number = {3},
     doi = {10.4153/CMB-1966-035-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1966-035-5/}
}