Li, M. ., Q. . Wu, Z. . Lin, Y. . Zhang, and X. . Zhao. “Efficient Improved Local Time Stepping With the Leapfrog Scheme for Transient 3-D Electromagnetic Analyses”. Applied Computational Electromagnetics Society Journal (ACES), vol. 38, no. 08, Aug. 2023, pp. 587-93, doi:10.13052/2023.ACES.J.380805.