1. Cummins KL, Hiscox WL, Henderson RW, Pyle RB, Blankenberger PK. U.S. National Lightning Detection Network. Proc 21st Int Conf on Lightning Protection, Berlin. Sponsored by the Association of German and Electrical Engineers (VDE) and VEAG (Berlin) and Siemens AG (Erlangen), September 22-25, 1992.
2. Cummins KL, Bardo EA, Hiscox WL, Pyle RB, Pifer AE. NLDN 95: A combined TOA/MDF technology upgrade of the U.S. National Lightning Detection Network. Proc Int Aerospace and Ground Conf on Lightning and Static Electricity. Williamsburg, VA. U.S. Navy Document Number NAWCAD-95-306-PRO. September 26-28, 1995.
3. Uman MA. The lightning discharge. New York: Academic Press, 1987.