Strong Instability of Standing Waves for the Nonlinear Klein-Gordon Equation and the Klein-Gordon-Zakharov System. - Masahito Ohta; Grozdena Todorova (SIAM J. Math. Anal., 2007)

The Generalized Diffusion Phenomenon and Applications. - Petronela Radu; Grozdena Todorova; Borislav Yordanov (SIAM J. Math. Anal., 2016)