S.Roobini, V.Shivaganeshan, B.Swathi, and S.Vidya. “CLOUD BASED MULTIFACTOR AUTHENTICATION FOR PERSONAL HEALTH RECORD”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 3, no. 5, May 2015, pp. 495-00, doi:10.61096/ijiarec.v3.iss5.2015.495-500.