  Radial pulsations of neutron stars and strange quark stars with nuclear crust
are studied. The avoided crossing phenomenon occurring for the radial modes is
found and discussed. Neutron star models are constructed using a realistic
equation of state of dense matter and strange star models using a
phenomenological bag model of quark matter. The eigenfrequencies of the three
lowest modes of linear, adiabatic pulsations are calculated, using the
relativistic equations for the radial oscillations.

Astrophysics