Instruments for Measuring the Gradient of the Absolute Values of the Magnetic Field. Global Journal of Science Frontier Research, [S. l.], v. 21, n. A2, p. 53–55, 2021. Disponível em: https://testing.journalofscience.org/index.php/GJSFR/article/view/2978. Acesso em: 4 feb. 2026.