Maikol, Steve Olsen, et al. “A Novel Authentication and Key Agreement Scheme for Countering MITM and Impersonation Attack in Medical Facilities”. International Journal of Integrated Engineering, vol. 13, no. 2, Dec. 2020, pp. 127-35, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/6641.