Lisovskij, A., S. Rupkus, and A. Janeliauskas. “Surface Acoustic Wave (SAW) Tags Structures and Models”. Elektronika Ir Elektrotechnika, vol. 60, no. 4, Apr. 2005, pp. 68-68, https://eejournal.ktu.lt/index.php/elt/article/view/10420.