  The recently developed formalism for the evaluation of nuclear form factors
in neutrinoless double beta decay is applied to $^{48}Ca$, $^{76}Ge$,
$^{82}Se$, $^{100}Mo$, $^{128}Te$ and $^{130}Te$ nuclei. Explicit analytical
expressions that follows from this theoretical development, in the single mode
model for the decay of $^{48}Ca$, have been worked out. They are useful both
for testing the full numerical calculations, and for analytically checking the
consistency with other formalisms. Large configuration space calculations are
compared with previous studies, where alternative formulations were used. Yet,
besides using the G-matrix as residual interaction, we here use a simple
$\delta$-force. Attention is paid to the connected effects of the short range
nuclear correlations and the finite nucleon size. Constraints on lepton number
violating terms in the weak Hamiltonian (effective neutrino Majorana mass and
effective right-handed current coupling strengths) are deduced.
