Degeneracy in Finite Time of 1D Quasilinear Wave Equations. - Yuusuke Sugiyama (SIAM J. Math. Anal., 2016)

Existence and nonexistence theorems of global weak solutions to degenerate quasilinear wave equations for the elasticity. - Yun-guang Lu; Yuusuke Sugiyama (Appl. Math. Lett., 2018)