Samuel R. Kingston, Hunter Ellis, Mashad U. Saleh, Evan J. Benoit, Ayobami Edun, Cynthia M. Furse, Michael A. Scarpulla, and Joel B. Harley. “Spread Spectrum Time Domain Reflectometry and Steepest Descent Inversion Spread Spectrum Time Domain Reflectometry and Steepest Descent Inversion”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 36, no. 2, Feb. 2021, pp. 190-8, https://journals.riverpublishers.com/index.php/ACES/article/view/7375.