File:Block diagram Theremin.svg - Wikipedia
Celebrating the Birth of the Theremin, by Alex Strasburg
How to Play the Theremin: 15 Steps (with Pictures) - wikiHow
Theremin - Wikipedia
File:Gregoire Blanc playing the theremin.jpg - Wikipedia
Leon Theremin invented a passive audio transmitter that was used
Experimental musical instruments: Theremin, Ondes Martenot
Theremin - Wikipedia
Digital Theremin Violin (DTV) - Lofaro Lab Wiki