1. Atmel Corporation. 2009. Touch Sensors Design Guide (10620D-AT42-04/09). http://www.farnell.com/datasheets/1504633.pdf. Atmel Corporation. 2009. Touch Sensors Design Guide (10620D-AT42-04/09). http://www.farnell.com/datasheets/1504633.pdf.
2. Back-of-device interaction allows creating very small touch devices
3. Feargal Cleary. 2019. Capacitive touch sensor design guide. http://ww1.microchip.com/downloads/en/Appnotes/Capacitive-Touch-Sensor-Design-Guide-DS00002934-B.pdf Feargal Cleary. 2019. Capacitive touch sensor design guide. http://ww1.microchip.com/downloads/en/Appnotes/Capacitive-Touch-Sensor-Design-Guide-DS00002934-B.pdf
4. Cypress Semiconductor Corporation. 2020. AN85951 – PSoC 4 and PSoC 6 MCU CapSense Design Guide. https://www.cypress.com/documentation/application-notes/an85951-psoc-4-and-psoc-6-mcu-capsense-design-guide. Cypress Semiconductor Corporation. 2020. AN85951 – PSoC 4 and PSoC 6 MCU CapSense Design Guide. https://www.cypress.com/documentation/application-notes/an85951-psoc-4-and-psoc-6-mcu-capsense-design-guide.