Harapin, A, J Radnic, and D Brzovic. “WYD Method for an Eigen Solution of Coupled Problems”. The International Journal of Multiphysics 3, no. 2 (June 30, 2009): 167-176. Accessed October 16, 2025. https://www.themultiphysicsjournal.com/index.php/ijm/article/view/3-2-167.