Ren, Xiaokui, Xiujuan Li, and Lirong Ma. “Research of Car Navigation Data Retrieval System”. International Journal of Online and Biomedical Engineering (iJOE) 9, no. S4 (May 1, 2013): pp. 25–29. Accessed April 25, 2026. https://online-journals.org/index.php/i-joe/article/view/2596.