Bossavit, Alain (January 2008). "What do voltmeters measure?". COMPEL - the International Journal for Computation and Mathematics in Electrical and Electronic Engineering. 27: 9–16. doi:10.1108/03321640810836582 – via ResearchGate.
David B. Newell, Eite Tiesinga (August 2019). The International System of Units (SI)(PDF) (Report). National Institute of Standards and Technology. p. 31. Retrieved 2 January 2024.
David B. Newell, Eite Tiesinga (August 2019). The International System of Units (SI)(PDF) (Report). National Institute of Standards and Technology. p. 88. Retrieved 2 January 2024.