%% -*-BibTeX-*- @InCollection{GroetschelKochHoang2010, author = "Martin Gr{\"o}tschel and Thorsten Koch and Nam D{\~u}ng Ho{\`a}ng", editor = "Katja Biermann and Martin Gr{\"o}tschel and Brigitte Lutz-Westphal", booktitle = "Besser als Mathe", title = "Lagenwechsel minimieren -- oder das Bohren von {L}{\"o}chern in Leiterplatten", publisher = "Vieweg+Teubner", pages = "161--174", year = "2010", URL = "http://link.springer.com/chapter/10.1007/978-3-8348-9380-2_19", language = "German", secondedition = "http://link.springer.com/chapter/10.1007/978-3-658-01004-1_19", seethenalso = "GroetschelKochHoang2013", }