2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198869We study the conditions for the fivebrane worldvolume theory in D=11 to admit supersymmetric solitons with non-vanishing self-dual three-form. We construct some new soliton solutions consisting of ``superpositions'' of calibrated surfaces, self-dual strings and instantons.Latex, 29 pages. Reference added, typos correctedHigh Energy Physics - Theorytext