2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/43511A possible model independent test of the theoretically calculated nuclear matrix elements of $0νββ$-decay is proposed. The test can be accomplished if $0νββ$-decay of three (or more) nuclei is observed. The selection of the nuclei for the next generation of $0νββ$-decay experiments should be done taking into account {\it also} considerations regarding the possibility to test the nuclear matrix element calculations.14 pagesHigh Energy Physics - Phenomenologytext