1. Theory of Oscillators;Andronov,1987
2. N.V. Butenin, Auto-oscillation, in: Encyclopedia of Mathematics, http://www.encyclopediaofmath.org/index.php?title=Auto-oscillation (accessed 21.10.2012).
3. A.A. Andronov and the development of soviet control engineering;Bissell;IEEE Control Syst. Mag.,1998
4. Footage of the Tacoma Narrows bridge by the Tacoma Fire Department, from the Stillman Fires Collection and the Prelinger Archives (1941). Available at http://www.archive.org/details/Pa2096Tacoma.
5. Classical Mechanics;Goldstein,2002