%0 Journal Article %A Álvarez Alonso, Amador %A Soler, M. %T Energetic Stability Criterion for a Nonlinear Spinorial Model %D 1983 %@ 0031-9007 %U https://hdl.handle.net/20.500.14352/64958 %X The time evolution of expanded and contracted solitary waves of the Dirac field with scalar self-interaction is exhibited. It is shown that the positivity of the second variation of the energy functional is not a necessary condition for the stability of these waves as has been recently suggested. %~