2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128442We determine the non-null homologous knots in lens spaces whose exteriors contain properly embedded once-punctured tori. All such knots arise as surgeries on the Whitehead link and are grid number 1 in their lens spaces. As a corollary, we classify once-punctured torus bundles that admit a lens space filling.37 pages, 29 figuresGeometric Topology57M27text