Seago, John H.; Seidelmann, P. Kenneth. "The mean-solar-time origin of Universal Time and UTC"(PDF). Paper presented at the AAS/AIAA Spaceflight Mechanics Meeting, Kauai, HI, USA, March 2013. Reprinted from Advances in the Astronomical Sciences v. 148. pp. 1789, 1801, 1805. Archived from the original(PDF) on 27 December 2013.
Seago, John H.; Seidelmann, P. Kenneth. "The mean-solar-time origin of Universal Time and UTC"(PDF). Paper presented at the AAS/AIAA Spaceflight Mechanics Meeting, Kauai, HI, USA, March 2013. Reprinted from Advances in the Astronomical Sciences v. 148. pp. 1789, 1801, 1805. Archived from the original(PDF) on 27 December 2013.
Matusitz, Jonathan Andre (16 September 2014). Symbolism in terrorism : motivation, communication, and behavior. Lanham: Rowman & Littlefield. ISBN9781442235793. OCLC891148726.