2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/203867The Duffin-Kemmer-Petiau (DKP) equation with a square step potential is used in a simple way with polymorphic purposes. It proves adequate to refuse a proposed new current that is currently interpreted as a probability current,to show that the Klein paradox does exist in the DKP theory and to revise other minor misconceptions diffused in the literature.11 pagesHigh Energy Physics - TheoryQuantum Physicstext