Ritz solution of the Helmholtz equation in a stadium-shaped domain with zero normal derivatives – applications to fluid sloshing and thermo-convective stability. Arch. Mech. [Internet]. 2017 Dec. 20 [cited 2025 Sep. 17];69(6):471-83. Available from: https://am.ippt.pan.pl/index.php/am/article/view/v69p471