Balabel, A. A. ., H. A. . Malhat, and . S. H. . Zainud-Deen. “Octafilar Helical Antenna for Wireless In-Body Capsule Endoscopy Applications”. Journal of Advanced Research in Applied Mechanics, vol. 44, no. 1, Nov. 2020, pp. 8-14, https://akademiabaru.com/submit/index.php/aram/article/view/1813.