%0 Journal Article %A Cerioli, Marcia R. %A Faria, Luerbio %A Ferreira, Talita O. %A Protti, Fábio %T A note on maximum independent sets and minimum clique partitions in unit disk graphs and penny graphs: complexity and approximation %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 2011 %P 331-346 %V 45 %N 3 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/ita/2011106/ %R 10.1051/ita/2011106 %G en %F ITA_2011__45_3_331_0