7Sujit P B, Beard R. Muhiple UAV exploration of an un- known region. Annals of Mathematics and Artificial Intel- ligence, 2008, 52(2-4).
8Iscold P ,Pereira GAS ,Torres LAB, et al. Development of a hand-launched small UAV for ground reconnais- sance. IEEE Transactions on Aerospace and Electronics Systems, 2010,46( 1 ).
9Zhan P C, Yu K, Swindlehurst A L. Wireless relay com- munications with unmanned aerial vehicles: performance and optimization. IEEE Transactions on Aerospace and Electronics Systems, 2011,47 ( 3 ).
10Vaze R, Heath R. On the capacity and diversity-multi- plexing tradeoff of the two-way relay channel. IEEE Transactions on Information Theory, 2011,57 (7).
