%0 Journal Article %T Index of Volume 60 %J Canadian journal of mathematics %D 2008 %P 1437-1440 %V 60 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2008-060-9/ %R 10.4153/CJM-2008-060-9 %F 10_4153_CJM_2008_060_9