Xiao Su  & Shubin Wang . (2019). A Blow-up Result with Arbitrary Positive Initial Energy for Nonlinear Wave Equations with Degenerate Damping Terms.
            <i>Journal of Partial Differential Equations</i>. <i>32</i> (2).
            181-190.
         doi:10.4208/jpde.v32.n2.7