Yuri Leonidovich Trakhinin, “On local well-posedness of problems with characteristic free boundary for hyperbolic systems of conservation laws”, Russian Math. Surveys, 79, № 2, 2024, 325
Guangyi Hong, Tao Luo, Zhonghao Zhao, “On the splash singularity for the free-boundary problem of the viscous and non-resistive incompressible magnetohydrodynamic equations in 3D”, Journal of Differential Equations, 419, 2025, 40