WASET
    Tarek Mohammad,  Using Ultrasonic and Infrared Sensors for Distance Measurement.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 27(3). 267 - 272
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/6833.