Wang, C.Y. “Ritz Solution of the Helmholtz Equation in a Stadium-Shaped Domain With Zero Normal Derivatives – Applications to Fluid Sloshing and Thermo-Convective Stability”. Archives of Mechanics 69, no. 6 (December 20, 2017): 471–483. Accessed January 17, 2026. http://am.ippt.gov.pl/index.php/am/article/view/v69p471.