Chatziioannou, Vasileios and Van Walstijn, Maarten (2015)
"Discrete-time conserved quantities for damped oscillators,"
in Proceedings of the Third Vienna Talk on Music Acoustics, p. 135-139
edited by Mayer, Alexander; Chatziioannou, Vasileios; Goebl, Werner, Institute Of Music Acoustics (Wiener Klangstil), Vienna, Austria