@article{b999fc869b8d4115b9e05553c25785bc,
title = "Colouring relatives of intervals on the plane, II: Intervals and rays in two directions",
abstract = "We give exact upper bounds on the chromatic number for the intersection graphs of intervals and rays in two directions on the plane in terms of clique number.",
author = "Kostochka, {A. V.} and J. Ne{\v s}et{\v r}il",
note = "Funding Information: AVK was partially supported by the grants 99-01-00581 and 97-01-01075 of the Russian Foundation for Fundamental Research. Part of JN{\textquoteright}s research was supported by GAUK Grant 158 and project LN00A056 of the Czech Ministary of Education",
year = "2002",
doi = "10.1006/eujc.2000.0433",
language = "English (US)",
volume = "23",
pages = "37--41",
journal = "European Journal of Combinatorics",
issn = "0195-6698",
publisher = "Academic Press Inc.",
number = "1",
}