Bansevicius, R., V. Grigaliunas, and J. A. Virbalis. “Investigation of Magnetic Circuit Permanent Magnet – Terfenol-D – Air”. Elektronika Ir Elektrotechnika, vol. 86, no. 6, July 2008, pp. 3-6, https://eejournal.ktu.lt/index.php/elt/article/view/11173.