Stewart, B., Pierazzo, E., Goldstein, D., Varghese, P. and Trafton, L., “Simulation of a comet impact on the Moon and associated ice deposition in polar cold traps,” Icarus, v. 215, Issue 1, Sept. 2011, pp. 1-16. http://dx.doi.org/10.1016/j.icarus.2011.03.014