@TechReport{ThiWag07, author = "Thierauf, Thomas and Wagner,Fabian", title = "The Isomorphism Problem for Planar 3-Connected Graphs is in Unambiguous Logspace", institution = "Electronic Colloquium on Computational Complexity", address = "http://eccc.hpi-web.de/eccc/", year = "2007", number = "TR07-068", }