Vikram, Melapudi, and Balasubramaniam Shanker. 2022. “An Incomplete Review of Fast Multipole Methods–from Static to Wideband–as Applied to Problems in Computational Electromagnetics”. Applied Computational Electromagnetics Society Journal (ACES) 24 (2):79-108. https://journals.riverpublishers.com/index.php/ACES/article/view/15893.