US patent 3170246, Koltun, Walter L., "Space filling atomic units and connectors for molecular models", issued 1965-02-23
pnas.org
Baker, N.A., Sept, D., Joseph, S., Holst, M.J. & McCammon, J.A., 2001, "Electrostatics of nanosystems: Application to microtubules and the ribosome," Proc. Natl. Acad. Sci. U.S.A.98: pp. 10037-10041, see [1], and "Calculating Electrostatics". Archived from the original on 2015-06-24. Retrieved 2015-06-23., and [2], accessed 23 June 2015.
poissonboltzmann.org
Baker, N.A., Sept, D., Joseph, S., Holst, M.J. & McCammon, J.A., 2001, "Electrostatics of nanosystems: Application to microtubules and the ribosome," Proc. Natl. Acad. Sci. U.S.A.98: pp. 10037-10041, see [1], and "Calculating Electrostatics". Archived from the original on 2015-06-24. Retrieved 2015-06-23., and [2], accessed 23 June 2015.
web.archive.org
Baker, N.A., Sept, D., Joseph, S., Holst, M.J. & McCammon, J.A., 2001, "Electrostatics of nanosystems: Application to microtubules and the ribosome," Proc. Natl. Acad. Sci. U.S.A.98: pp. 10037-10041, see [1], and "Calculating Electrostatics". Archived from the original on 2015-06-24. Retrieved 2015-06-23., and [2], accessed 23 June 2015.