Wei Zhang and Hong Yu and Xian-ping Zhao and Da-da Wang and Fei Xue, The Comprehensive Study Based on Ultrasonic and X-ray Visual Technology for GIS Equipment Detection. journal = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology. October 2011, vol. 58(10). 1350 - 1355 [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/14902.