1. H. M. Kim, Y. S. Choi, Y. G. Lee and H. R. Choi, Novel mechanism for in-pipe robot based on a multiaxial differential gear mechanism, IEEE/ASME Transactions on Mechatronics, 22 (1) (2017) 227–235.
2. D. K. Kim, H. R. Yoo, S. H. Cho, S. J. Koo, D. K. Kim, J. S. Yoo and Y. W. Rho, Inspection of unpiggable natural gas pipelines using in-pipe robot, International Conference on Advanced Engineering Theory and Applications, Cham (2017) 364–373.
3. D. L. Fang, J. Z. Shang, Z. R. Luo, P. Z. Lv and G. H. Wu, Development of a novel self-locking mechanism for continuous propulsion inchworm in-pipe robot, Advances in Mechanical Engineering, 10 (1) (2018) 1–11.
4. X. J. Huang, S. L. Chen, S. X. Guo, T. S. Xu, Q. L. Ma, S. J. Jin and G. S. Chirikjian, A 3d localization approach for subsea pipelines using a spherical detector, IEEE Sensors Journal, 17 (6) (2017) 1828–1836.
5. M. H. W. Hendrix, H. P. Ijsseldijk, W. P. Breugem and R. A. W. M. Henkes, Development of speed controlled pigging for low pressure pipelines, 18th International Conference on Multiphase Production Technology, Cannes, France (2017) 501–509.