  A comprehensive analysis of the structure of the nuclear matrix elements
(NMEs) of neutrinoless double beta-minus decays to the 0^+ ground and first
excited states is performed in terms of the contributing multipole states in
the intermediate nuclei of neutrinoless double beta-minus transitions. We
concentrate on the transitions mediated by the light (l-NMEs) Majorana
neutrinos. As nuclear model we use the proton-neutron quasiparticle
random-phase approximation (pnQRPA) with a realistic two-nucleon interaction
based on the Bonn one-boson-exchange G matrix. In the computations we include
the appropriate short-range correlations, nucleon form factors, higher-order
nucleonic weak currents and restore the isospin symmetry by the
isoscalar-isovector decomposition of the particle-particle proton-neutron
interaction parameter g_{pp}.
