| 1 | NOVA. "Sperry Aerial Torpedo (USA)". |
| 2 | John H. Lienhard. "KETTERING'S BUZZ BOMB". Boss Ket's pilotless 'buzz-bomb'. Automotive News, GM 75th Anniversary Issue, Sept. 16, 1983. |
| 3 | http://inside.chosun.com/site/data/html_dir/2014/03/06/2014030601194.html. |
| 4 | http://blogs.reuters.com/data-dive/files/2015/01/DroneStrikes013015.jpg. |
| 5 | http://smartplanes.se/#application. |
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