Burstall, FHertrichJeromin, UPedit, FPinkall, U2024-04-262024-04-261997https://hdl.handle.net/20.500.14394/34907<p>This is the pre-published version harvested from arXiv. The published version is located at</p> http://www.springerlink.com/content/knux48hud5bx641y/Physical Sciences and Mathematicsarticle