1. Betz, J. W., Lu, M., Morton, Y. T. J., & Yang, Y. (2019). Introduction to the special issue on the BeiDou navigation system. Navigation, 66, 3–5. https://doi.org/10.1002/navi.293.
2. China Satellite Navigation Office. (2016). China’s BeiDou Navigation Satellite System. http://www.beidou.gov.cn/xt/gfxz/201712/P020171221333863515306.pdf. Accessed 16 June 2016.
3. China Satellite Navigation Office. (2018). Applications of the BeiDou navigation satellite system. http://www.beidou.gov.cn/xt/gfxz/201906/P020190605488535070471.pdf. Accessed 27 Dec 2016.
4. China Satellite Navigation Office. (2019a). Development of the BeiDou Navigation Satellite System (Version 4.0). http://www.beidou.gov.cn/xt/gfxz/201912/P020191227430565455478.pdf. Accessed 27 Dec 2019.
5. China Satellite Navigation Office. (2019b). The Application Service Architecture of BeiDou Navigation Satellite System (version 1.0). http://www.beidou.gov.cn/xt/gfxz/201912/P020191227333024390305.pdf. Accessed 27 Dec 2019.