NAME;LINK
www.schmitzbits.de;https://www.schmitzbits.de/vco2.html
www.burosch.de;https://www.burosch.de/en/audio/1169-labor-blaetter-band-2-otas-grundlagen-und-anwendungen.html
www.birthofasynth.com;https://www.birthofasynth.com/Thomas_Henry/Pages/VCO-1_resources.html
www.synthesizeracademy.com;http://synthesizeracademy.com/voltage-controlled-amplifier-vca/
www.electrical4u;https://www.electrical4u.com/voltage-controlled-oscillator/