PORNPATKUL, C. AC Voltmeter Calibration. Journal of Advanced Development in Engineering and Science, Babgkok, Thailand, v. 1, n. 1, p. 65–70, 2023. Disponível em: https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/753. Acesso em: 13 apr. 2025.