Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleEditorial.AuthorsGeorge Ellis; Hermann NicolaiPublicationGeneral Relativity & Gravitation, 2008, Vol 40, Issue 10, p2029ISSN0001-7701Publication typeArticleDOI10.1007/s10714-008-0668-7