Sarkar, Tapan K., Young-seek Chung, and Magdalena Salazar Palma. 2022. “SOLUTION TO THE GENERAL HELMHOLTZ EQUATION STARTING FROM LAPLACE EQUATION”. Applied Computational Electromagnetics Society Journal (ACES) 17 (3):187-97. https://journals.riverpublishers.com/index.php/ACES/article/view/16961.