@InProceedings{elbassioni_et_al:LIPIcs.STACS.2009.1841,
  author =	{Elbassioni, Khaled and Krohn, Erik and Matijevic, Domagoj and Mestre, Julian and Severdija, Domagoj},
  title =	{{Improved Approximations for Guarding 1.5-Dimensional Terrains}},
  booktitle =	{26th International Symposium on Theoretical Aspects of Computer Science},
  pages =	{361--372},
  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.2009.1841},
  URN =		{urn:nbn:de:0030-drops-18410},
  doi =		{10.4230/LIPIcs.STACS.2009.1841},
  annote =	{Keywords: Covering problems, Guarding 1.5-terrains, Approximation algorithms, Linear programming, Totally balanced matrices}
}