2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126015This is a brief review of how sigma models in Projective Superspace have become important tools for constructing new hyperkähler metrics10 pages Contribution to ``The 27th Winter School GEOMETRY AND PHYSICS'', Czech Republic, Srni, January 13 - 20, 2007''High Energy Physics - Theorytext