  We focus on the implications of the oscillations for the shape of nuclear
beta-spectrum (=direct search for nu mass). This is of interest because of the
existing bound, m_(nu_e)<2.2 eV, that could improve by one order of magnitude
with future experiments. We stress important connections with the results of
Liquid Scintillator Neutrino Detector, nu_e disappearance experiments,
supernova neutrinos and neutrinoless double beta decay.
