Albaba, M., A. Al-Abdo, and Y. Khadra. “Calculation the Precision of the Conversion of Bio-Signals (heart Sounds) in Analog to Digital and Digital to Analog Conversion Processes in ATmega 8 Microcontroller Processors Using Computer Simulation”. Association of Arab Universities Journal of Engineering Sciences, Vol. 26, no. 4, Dec. 2019, pp. 105-12, doi:10.33261/jaaru.2019.26.4.013.