Hopf bifurcation theorem for evolution equations of hyperbolic type /

по Neves, Aloisio Freiria., Ribeiro, Hermano De Souza.
Опубликовано 1988.

On the spectrum of evolution operators generated by hyperbolic systems /

по Neves, Aloisio Freiria., Ribeiro, Hermano De Souza., Lopes, Orlando.
Опубликовано 1985.