Ekawita, R., A. A. Nasution, E. Yuliza, N. Suardi, and S. Suwarsono. “Development of Non-Invasive Blood Glucose Level Monitoring System Using Phone As a Patient Data Storage”. Jurnal Penelitian Fisika Dan Aplikasinya (JPFA), vol. 10, no. 2, Dec. 2020, pp. 103-1, doi:10.26740/jpfa.v10n2.p103-113.