1. Liquids: Structure, Properties, Solid Interactions;Bernal,1965
2. Böröczky, K., 1964. Ann. Univ. Sci. Budapest Estvss. Sect. Math.
3. Rigid circle and sphere packings;Connelly;Part I: Finite Packings, Structural Topology,1988
4. Rigid circle and sphere packings;Connelly;Part II: Infinite Packings, Structural Topology,1991
5. Donev, A., n.d. http://atom.princeton.edu/donev/Packing, homepage for the sphere packing project, with useful supplementary materials