Kumar D, Anil, and Dr. Hariprasad S A. “Design and Implementation of Pd Based Controller for Accurate Tracking Heading Angle”. International Journal of Engineering and Technology 7, no. 4.5 (September 22, 2018): 280–283. Accessed February 11, 2026. https://www.sciencepubco.com/index.php/IJET/article/view/20089.