(原始内容存档于2023-01-27). Tessler, Z. D.; Vörösmarty, C. J.; Grossberg, M.; Gladkova, I.; Aizenman, H.; Syvitski, J. P. M.; Foufoula-Georgiou, E. Profiling risk and sustainability
Lyndsey. "Metro Goes to New Heights." Washington Post. September 19, 1999. Aizenman, Nurith C. "County Sees Green in Metro's Arrival." Washington Post. January