1. Electrical parameters of soils in the frequency range from 1 kHz to 1 GHz, using lumped-circuit methods
2. Iwane Laboratories, 2009, White Paper : CV (Camera Vector) Calculation, Society of the Advancement of Positioning Technologies, https://jsapt.net/ja/post/19120001
3. GMS3 a unified system of ground penetrating radar and camera vector for efficient road infrastructure maintenance
4. J. Shinohara, T. Baba, S. Nakamae, W. Iwane, 2018, Underground exploration apparatus, Japan patent JP6446005B
5. J. Shinohara, T. Baba, 2018, Underground exploration apparatus and underground exploration vehicle, Japan patent JP6431573B