@InProceedings{fernau_et_al:LIPIcs.STACS.2009.1843,
  author =	{Fernau, Henning and Fomin, Fedor V. and Lokshtanov, Daniel and Raible, Daniel and Saurabh, Saket and Villanger, Yngve},
  title =	{{Kernel(s) for Problems with No Kernel: On Out-Trees with Many Leaves}},
  booktitle =	{26th International Symposium on Theoretical Aspects of Computer Science},
  pages =	{421--432},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-09-5},
  ISSN =	{1868-8969},
  year =	{2009},
  volume =	{3},
  editor =	{Albers, Susanne and Marion, Jean-Yves},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.STACS.2009.1843},
  URN =		{urn:nbn:de:0030-drops-18437},
  doi =		{10.4230/LIPIcs.STACS.2009.1843},
  annote =	{Keywords: Parameterized algorithms, Kernelization, Out-branching, Max-leaf, Lower bounds}
}