%0 Journal Article %A Lee, Jae-Hyouk %T Gosset Polytopes in Picard Groups of del Pezzo Surfaces %J Canadian journal of mathematics %D 2012 %P 123-150 %V 64 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2011-063-6/ %R 10.4153/CJM-2011-063-6 %F 10_4153_CJM_2011_063_6