Alonso-Garcia, S., J. Gomez-Gil, and J. I. Arribas. “Evaluation of the Use of Low-Cost GPS Receivers in the Autonomous Guidance of Agricultural Tractors”. Spanish Journal of Agricultural Research 9, no. 2 (May 30, 2011): 377-388. Accessed August 2, 2026. https://sjar.revistas.csic.es/index.php/sjar/article/view/1727.