@Misc{ KuwMonSch11, author = { Kuwert, Ernst and Mondino, Andrea and Schygulla, Johannes }, title = { Existence of immersed spheres minimizing curvature functionals in compact 3-manifolds }, journal = { Math. Annalen }, year = { 2011 }, pages = { }, URL = { http://cvgmt.sns.it/paper/1732/ }, note = { cvgmt preprint} }