FR patent 2502823A1, Bernard Szajner, "Laser Control Arrangement for Musical Synthesiser – Uses Mirrors to Reflect Laser Beams to Photocells in Synthesiser Control Circuits for Control by Beam Interruption", published 1 October 1982
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Elka Synthex Sounds. JMPSynth. 2009-04-01. Archived from the original on 2021-03-21. Retrieved 2009-04-01 – via YouTube.
Elka Synthex Laser Harp. Wavebox2011. 2011-02-27. Archived from the original on 2021-12-21. Retrieved 2011-02-27 – via YouTube.
