Yuniar, N., A. Supriyanto, H. R. Ayu, and S. W. Suciyati. “Design and Development of a Measuring Instrument for Cholesterol Level Detection in The Blood Using Non-Invasive Techniques Based on the Wemos D1 R1 Microcontroller”. Journal of Energy, Material, and Instrumentation Technology, vol. 6, no. 3, Aug. 2025, pp. 108-16, doi:10.23960/jemit.213.