Danni Cong and Meiping Wu and Hua Mu and Xiaofeng He and Junxiang Lian and Juliang Cao and Shaokun Cai and Hao Qin, Mathematical Modeling of the Working Principle of Gravity Gradient Instrument. journal = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2017, vol. 129(9). 823 - 827 [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10007891.