7ANSI/NISO 7-39.85 - 2001. The dublin core metadata element set[M]. USA:Maryland, NISO Press, 2001.
8Kern R, Van Hateren J H, Egelhaaf M. Representation of behaviourally relevant information by blowfly motion - sensitive visual interneurons requires precise compensatory head movements[J]. J. Exp. Biol, 2006(209):1251- 1260.